Anyone do a test on them ? Supposedly they are independent 4 channels.
Only one red/green indicator. From the pdf manual
Charger features
Charge 1 to 4 pieces of HR6/AA and/or 1 to 4 pieces of HR03/AAA rechargeable batteries.
4 charging channels.
Charge is terminated by individual minus delta voltage sensors (-dV).
Safety by separate safety timer and temperature sensors.
100-240V~ for worldwide use.
Non-rechargeable and damaged batteries detection.
Dual colour LED indicator.
The LED indicator will flash once in red for every new battery inserted. The indicator will stay red during charging and turn green when all batteries are charged. Trickle charging will start when the battery is fully charged.
The LED indicator will flash red and the charger will stop charging if non-rechargeable batteries or damaged batteries are inserted into the charger by mistake.
Model: YH-990BF
Input range: 100-240VAC, 50/60Hz, 0.2A
Output range: AA 1.2Vx4 1000mA AAA
1.2Vx4 500mA