Portable Emergency AA Battery Charger Extender for the HTC EVO 4G - with Gomadic Brand TipExchange T

• Specification: Input Voltage (4 X AA Batteries), Cable length (6 inches), Dimensions (5.0 X 1.5 X 0.75 inches), Circuit Design (HTC EVO 4G specific), TipExchange enabled (Yes)
• Integrated circuitry regulates output voltage specific to the HTC EVO 4G. Advanced logic maximizes overall charger efficiency.
• Built using the unique Gomadic TipExchange Technology that protects your investment by providing the ability to upgrade charging ports by simply swapping physical connectors.
• Safely engineered with reverse polarity protection, in the event batteries are accidentally put in incorrectly.
• This Gomadic Battery Pack can be reused forever by simply inserting fresh batteries, providing instant power on demand.

I put 4 AA rechargeable batteries (each has 2450 mah) in it and it recharged my HTC Evo from 75% to 100%,68% to 100% and 50% to 100% and that's all the juice 4 2450mah batteries have for one full charge of HTC evo. The LED light is a bad indicator. Even the batteries can't charge any more, it still shows green. I hope it can show yellow or red. lower capacity batteries (

Save 34% Off