Brand Name: OEM Model Number: B03 Style: Ear Hook Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) size: 51.5*17.5*8mm weight: 10 materil: ABS color: white,black packing: gift box Packaging & Delivery Packaging Detail: gift box Delivery Detail: 10-15days Specifications bluetooth version:V3.0+ EDR,support A2DP. work range:10m. standby time:100 hours talk time:4 hours. charge time:2 hours 1.Bluetooth versionV3.0+EDR2.Support profilesA2DP3.Work range10m4.Standby time100 hours5.Talk time4 hours6. Charge time2 hours7.Main functionanswer/end a call,redial,volume adjusting,reject a call.mute function.8.Package includeusb cable/ear hook/user manual
Brand Name: OEM Model Number: SE-668 Style: Ear Hook Communication: Wireless Connectors: 3.5mm Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Signal Frequency: 2.4-2.48GHz Battery: 80mAh Li-Polymer Battery Talk time: 2.5 hrs Standby time: 45hrs Packaging & Delivery Packaging Detail: gift box Delivery Detail: 20 days Specifications stereo bluetooth, best bluetooth headphones, wireless earbuds Bluetooth version 2.1+EDR CE,ROHS Bluetooth version 2.1+EDR Mini sdesign,smallst zise CE,ROHS,FCC Bluetooth standard: V2.0 Signal Frequency: 2.4-2.48GHz Transmission power: Class2 Measurement: 41*16*23mm Weight: 7.12g Function: Headet/Handfree profile Working range: 10M Talk time: 2.5 hrs Standby time: 45hrs Charging time: Less than 2 hrs Battery: 80mAh Li-Polymer Battery Charger&
Brand Name: for iphone Model Number: bluetooth headset Style: Ear Hook Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) color: black specification: bluetooth Packaging & Delivery Packaging Detail: Blister packing Delivery Detail: 5 days Specifications Bluetooth Headset for iphone 3G ,Bluetooth headset , Accessories for apple iphone 3G , Apple iphone ,Top quality , Stylish Bluetooth Headset for iphone 3G ,Bluetooth headset , Accessories for apple iphone 3G , Apple iphone ,Top quality , Stylish Stylish , Compact design , Light weightAdjustable earhook to allow wear by 2 earsIndicator for charging status Included Accessories :Bluetooth headsetAC chargerCharging cableearhook
Specifications bluetooth headphone 1.Fashional Design, 2.Stereo Bluetotoh Function 3.play music from your mobile 4.Bluetooth Headset v 2.1 bluetooth headphone Detailed Product Description Feartures: CE,ROHS,FCC and BQB ApprovalBluetooth Version V3.0/2.1+EDRSupports A2DP AVRCP, HSP and HFPEnjoy stereo music from coputer and mobileExtremely good quality,superior clear voiceMultimedia,stereo, foldable Headphone,NecKphoneHandsfree,compatible with all Bluetooth Devices Such As PS3 & IPHONEHigh Capacity&Rechargeable Lion BatteryAutomatic cennecting functionEnergy saving function,200% longer talk timHandsfree,answer/reject call and call the last coming NO.Voice Dialing,Re-dialing functionRemote control music playback,pause,up and down selections Volume control key,volume up and down Technical Paramiter: Frequency range: 40HZ-18KHz Transmission power:class2Transmission distance:10MOperating voltage:3.7VOperating current:&le
Specifications 1.super thin bluetooth headset 2.specification: 47.9*16.3*6mm,Weight:7g 3.Compatible with any Bluetooth enabled mobile phone super thin bluetooth headsetFeatureSupports HSP and HFP profiles Ultra-clear sound speaker&uymost sensitive microphone:-52db Rechargeable Battery:Li-poly Compatible with any Bluetooth enabled mobile phone,compeyer and other devi
Brand Name: Hysun Model Number: H1 Style: Headband Communication: Wireless Connectors: V2.1 Use: Portable Media Player Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Version: V2.1 Bluetooth range: 10M Talking time: Up to 10hours Standby time: Up to 50hours Charging time: 2.5hours Carrier frequency: 80Hz-20KHz Material: ABS+PVC Color: Black, white OEM service: Yes Packaging & Delivery Packaging Detail: PP polybag or according to customer's requirement Delivery Detail: 25-30 days after 30% TT received Specifications Best quality bluetooth headphone supplier, stereo bluetooth headset 1.Bluetooth V2.1+EDR 2.Top quality 3.Slim design 4.OEM Best quality bluetooth headphone supplier, stereo bluetooth headset Model No.: H1 Features: DescriptionBluetooth stereo headphoneDesign*Super Simple and fashionable appearance
Specifications CW-BH320 Cheapest Bluetooth Headset Bluetooth mono headset with low price CW-BH320 Cheapest Bluetooth Headset Chipset:Terax
Specifications 1.Bluetooth headphone 2.Micro card headphone 3.Wireless/Wired 5.High stereo 5.FM Radio Function characterisfics *Bluetooth function *2.5mm audio input general port,and can be used for other audio equipments *Rechargeable battery,convenient and practical*Play TF card stored in mp3/WMA /WAVfiles*High quality speaker and sound cavity design,ensure high fidelity.CD quality effect.*FM function Product specifications and parameters*support the computer system:win 2000,win XP,win vista,win 7*the usb interface:high speed usb2.0*support the memory card:TF card*support card capacity :16GB*support music file format:MP3,WMA,WAV*support audio sampling rate:8-48 KHZ(MP3 bit rate:8-448 KBS,WMA bit rate:32-384 KBS)*Battery:rechargeable lithium-ion polymer battery*Charging power supply:computer USB port DC5V;DC 5V(500 MA)travel charger;DC 5V(500MA)car charger*Frequency response:20 Hz-20 KHz*SNR:>90db*Output power:2*10Mw*Continuous working time:8-10hours*Char
Brand Name: OEM. Neutral Model Number: BH01 Style: Headband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling,Microphone Place of Origin: Guangdong China (Mainland) Bluetooth version: 3.0 +EDR RF Range: 10 meters Playing time: Up to 10 hours Talking Time: Up to 11 hours Standby Time: Up to 250 hours Charging time: 2 ~3 hours battery capacity: 280mah Color: Light Blue, Yellow, Red, White, Black, Pink Packaging & Delivery Packaging Detail: Each one in retail gift box Delivery Detail: within 48 hours Specifications 1. support all cellphone / PC/ Device with bluetooth function. 2 Wireless Stereo Bluetooth Headphone Universal Wireless Stereo Bluetooth Headphone for iphone ipad samsung cellphone We can OEM put your logo on the headset. Why coursing from us?Top Quality with Fast Shipment.1 year warranty.Excellent after-sale.Sample and bulk orders are available.Fast response within 12 hours and less.O
Model Number: BH3034 Style: Headband Communication: Wireless Connectors: Wireless Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: China (Mainland) Color: Black,Red, White Transmission Distance: 10M Standby time: 325 H Talking time: 35 H Charging time (maximum):: 1-2 H Bluetooth Version: 3.0+EDR Use for: Mobile Phone, PC bluetooth device Packaging & Delivery Packaging Detail: Blister / Retail box. Delivery Detail: 3-15days after deposit Specifications 1.With HI-FI speakers, super bass. 2.with SD card slot. 3.Bluetooth Version3.0 Features: With a 8 t Bluetooth Stereo Headset you can: 1) Built-in two Bass speakers, 3D speaker combination, 2 Subwoofer speakers , enjoy your HI-FI music. 2) With Micro SD slot , enjoy music everywhere.3) Control the music player and manage your calls with the media keys 4) Save time with fast charging 5) with 3.5mm audio cable, to connect this bluetoot
Specifications 1.bluetooth stereo headset 2.Unique and convenient folding design 3.Bluetooth AD2P for music streaming Rhapsody - Bluetooth Headphone (MIC, Rechargeable, Handfree)Rhapsody - Bluetooth Headphone (MIC, Rechargeable, Handfree)How To Inquire About Wholesale Discount Prices of This ProductVisit: http://www.ankaka.com/rhapsody-bluetooth-headphone-mic-rechargeable-handfree_p47017.htmlPrices offer on www.ankaka.com website are final for small order quantity.Ankaka offers price-matching on all our products.When we are shown a website with the same item being sold for less, we will update our listing to match the price within 48 hours.But if you are interested in a quote for a large quantityof items, please see this: http://support.ankaka.com/wholesale-prices-discounts/large-order-discountsManufacturer Specifications Main function: Bluetooth Stereo HeadsetAdditional function: Bluetooth Handsfree Headset for mobile phones or computersBluetooth Device Name: LB601Bluetooth Vers
Specifications T90 Wireless Bluetooth Headphone For PS3 1. Range 10 M 2. Talk Time: Up to 5.5 Hours 3. Standby Time: Up to 100 Hrs T90 Wireless Bluetooth Headphone For PS3 Rubber-Black (84004040) Introductions:Are you looking for a headset for PS3? Here we offer you a fantastic headset to feel the full-mouthed and realistic sound. It features faster connection and anti-interference, so that you can enjoy clearer voice transmission and sound quality.Use-friendly design ensures convenient usage and all-day wearing comfort. Equipped with it, you can experience with stimulation function.It is a perfect partner for PS3. Just order one to have a different gameplay experience. Features:1. The wireless Bluetooth gaming headset for PS3 and PC provides crystal clear communication when playing popular First Person Shooter (FPS) such as Call Of Duty, Battle Field Bad Company 2, Black Ops and Crysis 2 2. Provides high quality ster
Specifications 1) Bluetooth Headset 2) V3.0+EDR 3) OEM Brand 4) Color Customized 5) Gift Box Model No.: F-0350 * Stereo Bluetooth Headphone * Work with mobile phones, new Nano, tablet pc, etc MOQ:3KModel:F-0350Color:CustomizedPower:USB Charging CableCertificate:CE/FCC/ROHS Market Share:North America (15%)Europe (20 %)South America (12%)Japan (10 %)Malaysia (22 %)Korea (10 %)Philippines (8 %)Other countries (3%) Feature:1) Head-band style 2) Hand Free Function3) Song Chosen Button, easy control4) Volume button5) 10 meters Bluetooth Range6) Rechargeable Battery built-in7) Colors Customized8) Eco-friendly and long time standby9) Hi-fi stereo quality10) OEM brand11) Large Market Scale12) Cheap and qualityPackage:Gift BoxPacking Details:100 PCS/CTN/51*46*30.5 CMSample:Available Specification: Bluetooth Version:V3.0+EDRSupported Profiles:HSP: Heads
Specifications Superior sound quality wireless bluetooth headphone. Factory price, fashion design ,fast delivery Perfect quality . Products Medol:BT-300 BlackProducts Detail: THD:<1%SNR:≥75 dbSpeaker Size:40mmSpeaker Impedance:32ΩUsing Hours: 9-12 HoursHeadphones Net Weight:140gCarrier Frequency: BluetoothReceiving Range:8m,360 degreesFrequency Response:20 Hz—20 KHzOther Features: Built-in rechargeable battery/USB sound card Features:Perfect stereo sound,support bluetooth receiving, within 12m.With microphone,support taking phone call directly by earphone. Weight: 255 gBox Size: 81*41*32 cmPer/Box: 36 pcs
Specifications Bluetooth 2.1 wireless transmission protocol High SNR Bluetooth audio connection Switch-over between calls and music Description: Bluetooth headset 1: Bluetooth 2.1 wireless transmission protocol &nbs
Model Number: Arhythm-003 Style: Ear Hook Communication: Wireless Connectors: Bluetooth Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) Color: All colors Packaging & Delivery Packaging Detail: Gift box packing per unit, strong export outer carton. Delivery Detail: Within 7-10 working days after payment arrived Specifications Hotest Bluetooth Headphone wireless stereo bluetooth headset;Bluetooth specification v3.0+EDR class23;Rechargeable battery. Arhythm-003 FeaturesBatteryRechargeable 520mAh lithium batteryMaterailPlasticWeight138gTalk time24 HoursStand-by time30 DaysCharging time6 HoursDesignPortable foldable;scaleable Distance8-10 MetersFrequency range2.40GHz-2.48GHzTransmitting powerGlass2Bluetooth versionV3.0+EDRDevices SupportedAll digital devices with bluetooth functionPrinting Options:Silkscreen&Digital printing,Water transfer printingPacking DetailsDemension85mm*85mmPackaging size186mm*78mm*210mm Feature:Most advanced buletooth technology
Brand Name: HFL Model Number: HFL-DSC00143 Style: In-Ear Communication: Wired Connectors: other Use: earphone Function: Bluetooth,Silicone earphone plugs Place of Origin: Guangdong China (Mainland) Material: 100% food grade silicone Size: 12x13mm Layer: Double Layers Color: Different Colors Payment terms: T/T, L/C Payment methords: FOB shenzhen Certificate: ISO9001,SGS MOQ: 10000pcs Shipment: as customized Packaging & Delivery Packaging Detail: Inner packing:2pcs packed in polybag,1000pcs packed in polybag outer packing:10 polybags/ctn measurement:335*290*265mm We also can make the packing by clients' request . Delivery Detail: 15-25days Specifications Silicone earplugs for bluetooth headset 1,Material: silicone 2,MOQ:10000pcs 3,Shipment: as customzied 4,Color: as cutomized silicone earplugs for bluetooth headset:1.Made of 100% grade silicone with FDA and SGS approval2.Bowl shape to fit the ear canal comfortably for decreasing noise 3.Non-toxic,smooth, dirt resistant4.More c
Brand Name: OEM Model Number: HB18-01 Style: Headband Communication: Wireless Connectors: 3.5mm Use: Computer Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Speaker: 40mm color: as your request logo: welcome Packaging & Delivery Packaging Detail: 1.blister package 2.white box/color box 3.custom carton Delivery Detail: 20days after you confirmed the order Specifications hot sell bluetooth headphones,black bluetooth headphone,bluetooth headphone manufacturers&suppliers&exporters cool bluetooth headphones,black bluetooth headphone,bluetooth headphone manufacturers&suppliers&exporters Description:1,wireless headphone 2,FM radio 3,wireless monitoring 4,microphone for net chat5 in 1 wireless headphonewhich works freely with PC,MP3,TV,MD,DVD etc;High Sensitivity, interference resistance, strong signal, outstanding performance, effective range over 8m, and reception beyond obstacle of wall. Bass speaker for great enjoyment
Specifications It let us able to use it to talk Skype, MSN,QQ. receives audio from Bluetooth stereo mobile phone, notebook, MP3, talk phone Sports Stereo Bluetooth Headset Headphone For Samsung G alaxy S IV S4 i9500 Black Product Description
Brand Name: iXchange Model Number: UA07XB Style: Headband Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) Bluetooth Version: V2.1 + EDR Bluetooth Profile: HSP, HFP Charging Time: 1.5 hours Talk Time: 3-4 hours Standby Time: 100 hours Operation Range: 10 mrters without obstructions Dimension: 48.5x17x10mm Weight: 10g Color: Black Factory price: Yes Packaging & Delivery Packaging Detail: Gift box with 1 headset and 1 USB cable Delivery Detail: 30 days after deposit payment Specifications Touchsense bluetooth headset 1.An Over-the-ear comfort design headset 2.Small and fashionable headset 3. CE,RoHS,BQB Touchsense bluetooth headsetOne multi-function Button LED Indicator for different status Multi-point connection with two Bluetooth enables devices Automatic Re-connection with your headset and Bluetooth enables devices Voice Dialing and last number Redial functions Work with all iPhone,
Brand Name: Gamechn Style: Ear Hook Communication: Wireless Connectors: USB Use: video game Function: Bluetooth Specifications We offer Bluetooth Headset for ps3,wireless bluetooth headset,for ps3 accessories. We offer Bluetooth Headset for ps3,wireless bluetooth headset,for ps3 accessoriesShipping Order will be shipped within 1-2 business days once we receive your payment.If you pay by e-check, we will ship your order once your payment is cleared. A shipping notification with tracking number will be emailed to you once your order has been shipped. Items will be sent as a gift to avoid customs duty.We are not responsible for any customs duty incurred at foreign customs.---------------------------------------------------------------------------------Payment We accept payment via paypal. Credit card payment can also be made via paypal.Please make your payment within 14 days after checkout.To expedite your order processing please include your order number and buyer name in all forms of p
Specifications Bluetooth Headset for iPhone 4G (4-Hour Talk Time/100-Hour Standby) 1 Compatible with iPhone 4 2 Long standby 3 Long call Bluetooth Headset for iPhone 4G (4-Hour Talk Time/100-Hour Standby ) Main Feature:Compatible with iPhone 4 Long standby Long call Very Clear through the noiseSpecification: Bluetooth standard: V2.1, class 2 Supported profiles: Headset, Hands-free Built-in rechargeable Li-ion battery Operation range: Within 10 meters Talking time: up to 4 hours Standby time: up to 100 hours Charging time: up to 1.5 hours Package weight: 72g Package size: 18*9.5*4.1cmPackage: 1 x Bluetooth headset 1 x 110V~240V AC charger 1 x Chinese/English manual 1 x Ear cli
Brand Name: OEM Model Number: E-Q520 Style: In-Ear Communication: Wireless Connectors: 3.5mm Use: Portable Media Player,moblie phone Function: Bluetooth,Waterproof,Noise Cancelling,Microphone,bluetooth Place of Origin: China (Mainland) warranty: one year quality: high quality orignal place: shenzhen color: black/white/grey delivery time: 3-5days payment terms: t/t. l/c, wester union. paypay Packaging & Delivery Packaging Detail: In gift box,100pcs/Carton,41.5*31*47MM.G.W.:6.64KG Delivery Detail: 1-10days Specifications bluetooth headphone 1.FOB:$0-$7.85/pcs 2.Port: shenzhen/hk 3.MOQ: 500 Piece/Pieces 4.Payment Terms: L/C,T/t Specifications bluetooth speakerGreat sound&Multiple use; connect 2 divices at the same time. can be used with other headphone jack3.5mmstereo Specifications : Bluetooth VersionV3.0TypeHandset/HandfreeOperation DistanceUp to 30 Feet (10Meters)Range of Frequency2.4GHz Sensitivity85dBPC InterfaceUSB2.0Charging Time2 HoursStandby
Specifications Double Mic Noise Cancellation Bluetooth Headset high quality.pretty bluetooth headset Suitable for one or two earsAdopt the most advanced dual-Mic noise cancellation tech to stop any interference, ensure all conversations can be free from obstruction.DSP for crystal sound qualityComfortable for all day useHigh performance with Bluetooth 2.1 EDR techBattery indicatorRadius of transmission-10 metersspecification:Chipset:CSR BC5 V2.1Support:A2DP,AVRCP,Headset,Headfree,Noise-Canceling,Voice-Dial/MuteBroadcast Range:10MTalking Time:4 hoursStand-by time:100 hoursColor: BlackNet weight:10gPackage includes:1 X bluetooth headset1 X power charger1 X ear hook1 X English manual
Brand Name: cifeng Model Number: v2.1-x8 Style: In-Ear Communication: Wireless Connectors: USB Use: Mobile Phone Function: Bluetooth Place of Origin: Guangdong China (Mainland) color: black white Packaging & Delivery Packaging Detail: Conventional packaging (color box and plastic) Delivery Detail: 2-5 working days Specifications 1.Bluetooth headset V2.1-X9 2.working distance: 10m 3.good voice Operation range: Up to 10 metersBluetooth version: V2.1Comfortable ear hookSolution: CSRTalk time: Up to 3 hoursStandby time: Up to 100 hoursWeight: about 10 gramsDimensions:(L)48mm*(W)18mm*(H)12mmBattery type: Rechargeable Poly -Li batteryMultifunction: reject a call, call redial, voice recognition*Universal Micro USB charge port
Brand Name: MQIY,SIOMY,OEM Model Number: OY-BT836 Style: Headband,blue tooth Communication: Wireless Connectors: wireless, blue tooth Use: Portable Media Player,player,computer Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: multi Packaging & Delivery Packaging Detail: unit tray+blister packing+polybag /window color box. 40pcs/ctn (double corrugated export master carton) Delivery Detail: 15-20 days after deposit Specifications bluetooth headphones foldable design for comfortable wearing quality certificate sound effect high reasonalbe price bluetooth headphone OEM/OEM serviceown design to meet marketdifferent color for aesthetics optionfoldable to comfort wearinghigh quality to relaxing pressuremusic to easing feelingquality CE approval andEnviroment green ROHS material no harm to health Speaker parameter: Speaker diameter: φ40mm &nb
Specifications 1) bluetooth headset help you enjoy music wirelessly 2)Support FM, can receive high-quality stereo radio. 3)support TF card Specification of Bluetooth headset(YP-701)1) Bluetooth version :V2.1+EDR 2) Operation distance:10m 3) Range of frequency:2.4 to 2.4835GHz ISM band4) Sensitivity:85dB Specification Of MP3/FM1) PC interface: USB2.02) Music format: MP3 /WMA 3) TF card support :128M-32GB4) FM frequency response: 87.5-108MHZ5) Rechargeable lithium battery:350mAh Specification Of Headphone1) Type: stereo headphone with MIC 2) Speaker : φ40mm3) Sensitivity: 115Db S.P.L at 1K
Specifications Bluetooth headset production factory wireless bluetooth headphones 1.Talking time 5.5H 2.Battery recharge time 1-2H Bluetooth headset production factory wireless bluetooth headphonessoftware for NK Feature:1.Talking time 5.5H2.Battery recharge time 1-2H3.Warranty 1 yearDetails:wireless mini headset for mobilegood sound qualityOEM service&good priceFeature:Elliptic design: Fashion, Lightweight Specially designed hard back cover for mobile bluetooth Headphone jack and charging opening and camera opening Easy to take off or install it. No need any toolsHang design:more convernient for woking, sporting etc.Standard 3.5mm earphone jackVoice activated dialingLow voltage alarmbluetooth headset Handsfree SpecificationV2.1+EDRBluetooth ProgramISSC+Class2ModelHandsFree/HeadsetWireless Frequency Range2.4GEnvironment Temperature-20/+60°CStandby Current≤2mABattery Capacity48mA/hStandby time120 hoursTalking ti
Specifications 1.plastic earphone 2.colorful earphone 3.in-ear earphone 4.3.5mm stereo plug New!Hot sale!Bluetooth headphones! New!Hot sale!Bluetooth headphones! Here is bluetooth headphones Enjoy Music without wire. Key features: Maximum bass and fidelity, wide and clear sounds enable you enjoying the music happily and freely…..Fashionable and novel design zipper HeadphoneThis Universal lightweight Zipper headphone allows you to enjoy your music in a trendy fashion.Noise isolating earcup block exterior noise to enhance your listening experience.Adjustable inside-stainless headband and foldable headphone, easy to store, convenient for travel.Also an ideal choice for the classical music lover.3.5mm plug and/or 2.5mm plug, ideal for iphoneMore Colors choice: Black and white. Product Characteristics: SpeakerDriver Diameter: Ø40mmImpedance: 32ΩFrequency Response: 20Hz~20kHzSensitivity (S.P.L):108
Specifications With a Bluetooth Stereo Headset you can Enjoy high-quality stereo sound streamed from your compatible phone Stereo Bluetooth Headset with MP3 Built in S500 Features:Brand new and high qualityEasy to take, free your hand any timeEase your lift and makes your life convenientFashionable and unique designBluetooth headset with MP3 built in, TF card support and Bluetooth wireless communication functions Specification:Bluetooth Version: Bluetooth 2.1+EDR technologyFrequency Range: 2.4GHz-2.4835GHzBluetooth Distance: 10mOnly 43gram weightExternal Expansion Card: TF card up to 16GBFrequency response: 20Hz-20kHzStereo: CD effectLED indication lightBattery: 240mAh rechargeable lithium-ion batteryCharging Voltage: DC 5VUSB Port ChargedUSB Port: USB 2.0Package included:1 x MP3 Bluetooth Sport Headphones1 x USB Charging Cable1 x English and Chinese Manual1 x Battery Chager