AA Battery Charger (EC001)

Product Description

This charger is intended for use with one standard 1.5 V AA primary or secondary cell. It can, however, be used with any standard 1.2 --1.5 V AA batteries. Higher quality or premium batteries are recommended, as their lower internal resistance increases performance of the charger. In order to optimize charging, the circuit decreases the charging current when the AA cell voltage falls below 1.1 V, and stops charging altogether when it falls below 0.6 V.
EC001 is simple to use, just follow these steps:
1. Load a single AA battery into the EC001 and a small, red light will begin flashing.
2. Connect your phone-specific connector to the flashing unit.
3. Connect your phone to the connector.
4. Your phone indicates that it is charging.

Designed for use with one primary or rechargeable cell.
Designed for use with mobile electronics powered by a single Lithium cell.
Charging current: 380mA maximum (varies with usage conditions).
Adds up to 240mAh to devices battery per AA battery.

Enables immediate usage of device, even if battery is fully depleted.
1umA discharge current from alkaline battery when charging is deactivated.
Typical efficiency 87%.
Compact size.

Automatic startup when current drawn at output (upon connection to device).
Automatic shutdown when no current drawn at output (10 second delay).
Automatic shutdown when primary battery is depleted.
Open-circuit output voltage 5.7V.
Indicator LED (flashes when charging).

Absolute maximum ratings
Maximum primary battery voltage
(VALK+ - VALK-): 3.2 V
Maximum output voltage
(VOUT+ - VOUT-): 6 V

Output
The EC001 was intended for use with cellular telephones and other similar devices that are powered by a one-cell lithium battery of any capacity.

Since each device model has different charging characteristics, it is possible that the circuit will function differently with some models. Such situations can be rectified by slight changes to the circuit.