I bought a shaver that came with two rechargeable battery packs (2 x AA 900mAh 1.2V)Both packs powered the shaver fully for awhile until the energy was drained. However, the adapter (AC: 200V~50Hz DC: 3V 500mA) it came with does not charge either battery pack. When I plug the adapter to the battery pack, the red light comes on, so I know contact is being made, but no matter how long I leave it there, either battery pack does not charge.I'm not electrically skilled, so I was hoping someone on here could help me out.
Check if you have followed properly the battery polarity connection to its terminal. The contact must be positive to positive and negative to negative. If it was not followed the charger's red light will still comes on,but the battery pack will not charge because there is a reverse polarity circuit protection inside the charger. This is to protect the battery in case it was inserted in reverse position (polarity). The power supply current will not charge the battery or goes to battery. It will be blocked by the diode protection that is connected in series, This diode allows current passing in one direction only (polarized forward) and does not in the opposite (reverse polarization).
