1 README : Battery Info on Sat Dec 19, 2009 7:57 pm
If you have a Nickel Cadium battery you need to use the following equation:
Battery capacity x 1.4 / Charger Output
For a 600mah small battery on a 250mah charger: 600 x 1.4 / 250 = 3.36 hours
For a 2400mah large battery on a variable charger charging at 120: 2400 x 1.4 / 120 = 28 hours
Nickel Metal Hydride batteries are less charging efficient and use the following equation:
Battery capacity x 1.5 / Charger Output
For a 1050mah small battery on a 250mah charger: 1050 x 1.5 / 250 = 6.3 hours
For a 3300mah large battery on a variable charger charging at 120: 3300 x 1.5 / 120 = 41.25 hours
Ni-Cad or NiCad (Nickel Cadium)
A single cell is 1.2volts, so if 7 2400mah cells are made into a pack the result is 7 x 1.2 = 8.4 volts. This would be a large battery. Large batteries just mean they usually fit into full stock guns, e.g. M16 or MP5A4. Although some full stock guns can fit a 9.6 volt battery which would consist of 8 cells, or even 10.8volt batteries, which consist of 9 cells. Small batteries have the same layout as large batteries but on a smaller scale. The most you can get out a small NiCad cell is 600mah, where as the most you can get out of a large NiCad cell is 2400mah. NiCad's have a constant level of power and then very suddenly drop off and die. This means your gun has a constant rate of fire right up until the end. NiCad's have to be discharged fully after use to stop the formation of crystals, these crystals shorten the life of your battery. This is also know as when a battery develops a memory.
NiMH (Nickel metal hydride)
Nickel metal hydride cells typically have more capacity than NiCad's however this comes at a price. The most you can get out of a large NiMH cell is 3600mah, although these are very rare and 3300 is more common, the most you'll get out of a small NiMH cell is 1050. As I said more capacity does not mean a better battery, this penalty is that, unlike NiCad's, NiMH's slowly lose power until they finally die. This means after a while your guns rate of fire will slowly start to decrease until it becomes hopelessly slow. NiMH do not need to be discharged although it can still be done, for the user to know how long he needs to charge from. However, I’ve heard discharging a NiHM too much can cause damage to the battery. TM Dischargers do not totally discharge batteries for safety reasons.
Original post of Botulism at AirsoftOhio.
got this from FAS...