Q&A for How to Charge NiMH Batteries

It's not a great idea unless you know what you are doing. But if it's a functional pack you should be able to extract a functional cell. Be warned that packs may be made with cells that are not a typical consumer size, e.g. AA, and the contacts/terminals may be spot welded together. If you pierce the cells or damage a contact while disassembling, you could create a dangerous or just plain useless dead battery.

If the light goes from red to green and is blinking, it indicates that it will be fully charged soon.

You can find them on online sites like Amazon.

It should be close to 6V.

If the charger says it can, then yes. Most universal chargers for everyday rechargeable batteries will work with both types as well. Most modern chargers will work with both types.

It probably depends on the charger, but if it was only a few seconds, it should be fine.

Charged capacity is how much capacity the battery has when fully charged. It's measured in milliamp hours, or mAh. 1000 mAh is 1 amp hour, and that means that the battery can provide 1 amp for 1 hour or 2 amps for 30 minutes.

No. If you have two AA batteries in one charger, the electricity will be split evenly between the batteries. If you have four, it's split even more, and it takes more electricity to charge them. It's healthier for the batteries to receive less electricity in a given amount of time, so charge more batteries at once if possible.