- How long I need to charge the Li-Ion Rechargeable Battery(NP-BK1)?
1-2 hours to recharge, but that depends if it is fully discharged or not if you are charging it in the camera or use a fast charger. How long can you use the battery, that depends on the amount of messing about you do IE Zoom, checking the video you have taken, if the camera is tape then if you wind and rewind the tape. after each scene turning off the camera helps to save battery life.
- What's the highest mAh Li-ion 3.6V rechargeable battery available in AAA?
Due to the chemistry involved Li-ion batteries aren't available in conventional battery sizes.Li-ion are also always 3.6V, would be too high a voltage.
- What is the difference between NiCd, NiMh, and Li-Ion rechargeable battery packs?
NiCd must be fully drained before recharging (will shorten duration if you don't.) However, they take longer to wear out (and are cheaper than) NiMh.
NiMh can be recharged at any time, although the battery duration will get shorter through the life of the battery. Generally the best choice for rechargeble batteries in digital cameras, since the camera does not actually drain the battery completely.
Li-Ion are designed for devices that can be continually plugged in, charging when needed, and have the longest life (and one can purchase batteries of differing durations, if you want more). These are the most expensive and are the type normally included with portable electronics, like cellphone, laptop computers, iPods, etc. Needless to say, it's the best quality (and most expensive of the three.)