Wireless: RAVPower? Element 10400mAh External Battery USB Portable Charger (Dual USB Outputs, Ultra Compact Design), for iPhone 5, 5S, 5C, 4S, 4, iPad Air, 4, 3, 2, Mini 2 (Apple adapters not included); Samsung Galaxy S5, S4, S3, S2, Note 3, Note 2; HTC One, EVO, Thunderbolt, Incredible, Droid DNA, Motorola ATRIX, Droid, Moto X, Google Glass, Nexus 4, Nexus 5, Nexus 7, Nexus 10, LG Optimus, PS Vita, GoPro, Smart Watch and More - Black - RAVPower
CE: SMAKN 18650 5V Box Portable-type Mobile Power Supply USB Battery Charger White - SMAKN
Lawn & Patio: General Shop White Perfume Universal 2600mah USB Battery Charger Portable External Rechargeable Power Bank with Key Ring for Iphone 4 4s 5 Samsung Nokia Mp3 Mp4 HTC - Generic
Art and Craft Supply: Welltop? mini USB Fan 18650 Rechargeable Battery or Electric-Powered With Adapter (pink) - Welltop
CE: White 5V Mobile Portable USB Battery Charger Power Supply 18650 Box for MP4 iPad - JDGHVAWEOGW
Wireless: 7800mAh KAISI high-capacity External Battery Pack Portable Power Pack Charger for most Smartphones, Tablets and other USB-charged devices (Apple Adapters- 30 pin, NOT Included) - SAND TECH
Wireless: RAVPower Luster 6000mAh Backup External Battery Pack Power Bank Charger for iPhone 5S, 5C, 5, 4S, 4, iPod, iPad Air, Mini2 (apple adapter not Provided); Samsung Galaxy S5, S4, S3, S2, Note3, Note 2; Nexus 5, Nexus 4, HTC One, EVO 4G, Thunderbolt; Nokia Lumia 1520, 1020, 920 900 N9; Motorola Droid Maxx, Moto X ; LG G2 and other Android & Apple Device, Smart Phones, Tablets (Premium Samsung Battery, 2.1A Smart Output, Aluminous Alloy) (Blue) - RAVPower
Network Media Player: USB Sock-IT Pro Series Voyage Power Bank (Black) - USB Socket
CE: GreatShield LuminousPower External Battery Pack 7800mAh High Capacity Power Bank Portable Backup Charger for Cell Phones, Tablets & Portable Electronics (Gray & White) - GreatShield
Wireless: 5600mah External Battery Pack Portable Charger Backup Battery USB Power Bank Travel Charger with Built in Flash Light for iPhone, HTC, Samsung, Nokia, Blackberry, LG etc (White) - SPO
Home Improvement: LingsFire? LS-S2 Universal Intelligent Automatic Fast USB Port Dual/Double-Channel Rechargeable Battery Spring Charger for 1.2V and 3.7V Rechargeable Battery, 1.2V/AA AAA 3.7V/18650,18500,17650,16340,14500,10500 Batteries - LingsFire
PC Accessory: MagicDots Powerful 3 Modes Desktop Mini Portable USB Cooling Fan, Rechargeable Battery, Quality Plastic, Above 4.2M/s Strong Wind,Pure Copper Motor 3150RPM/min - MagicDots
Photography: AccuPower IQ-203 Universal Battery Charger Li-ion NiMH NiCd with USB Power Bank Function AC & DC 12V - AccuPower Gmbh
Wireless: JgmaxTM 18650 USB Universal Portable Charger/power Bank 2x 2500mah 18650 Rechargeable Li-ion Battery Pack Combo (5000mah Power Pack) - JGmax
Wireless: Portable Cell Phone Charger - Money Back Guarantee - The Geeksy Ultra Compact Power Bank Helps You Start Doing More Fun Things With Your Extra Free Time... Guaranteed! More Freedom For Fun, Travel Or Being Outdoors - Able To Charge On-The-Go, No Outlet Needed - The Best Universal, Silver, External Emergency Battery Backup Pack For Smartphones Like iPhone 4, 5, 5s, Android, Samsung Galaxy S3, S4 Plus Many More Devices - FREE USB Charging Cable Included - 24/7 Customer Service - Limited Time Sale - Buy Now! - Tylas Products LLC
Wireless: EC TECHNOLOGY? Mini 2600mAh Portable External Battery Pack Power Bank Charger With Flashlight(NO CONNECTORS INCLUDED) - Silver - EC Technology
Lawn & Patio: 5V 2A Output Phone Tablet PC 18650 Portable Battery Box USB Mobile Power Supply - BLASER
Network Media Player: Floureon? 10400mAh Cell Phone Portable External Battery Power Bank Backup Charger Pack for iPhone 5, 4S, 4, 3GS, iPod, iPad, Mini; Samsung Galaxy Note & Tablets, S4, S3, S2, Nexus; HTC: One, EVO, Thunderbolt, Incredible, Droid; LG: Nexus, Optimus; Blackberry: Z10, Torch, Tour; Motorola: Razr, Droid; Nokia: Lumia; Sony: Xperian; All Carriers: AT&T, Verizon, Sprint, T-Mobile, etc. Works For Cell Phones, Smartphones, Tablet, E-Readers, Cellular Phones, & Android (Premium Samsung Cells Adopted) - Floureon?
Lawn & Patio: iHour Universal Portable External Charger USB Power Bank 2-in-1 power bank 6600mAh with detachable bluetooth headset headphone earphone for Smart Phones and other Digital Devices -black - iHour
CE: GreatShield PowerTank 10400mah Compact High Capacity Power Bank Portable External Battery Charger Pack for Cell Phones Tablets & Other Portable Electronics (Dual 1.0A/2.1A USB Output with Metal Casing & LEDs) - Silver - GreatShield
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Portable Usb Battery Charger Power Supply 18650 Popular Q&A
Q: How to make an rc-car-battery powered portable usb charger?
A: You need a switch mode regulator. You can start with a USB car charger. For the battery indicator, use a TL431, and an transistor inverter to drive the LED. Read More »
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A: That can be a very complex problem. The specifications for USB port power say different things depending on the USB version, 1, 1.1, 2 or 3. Then there is the i... Read More »