From a safety standpoint what is important is your
batteries continuous amp rating. For a regulated mod, in VW mode, you calculate the max current draw as Max Amps = Max Wattage / Min Battery Voltage. Min battery voltage is usually calculated using 3.2 volts. This is the point your mod will no longer fire and you need to remove the battery and charge on a dedicated charger.
So Max Amps = 50 watts/3.2 volts = 15.625 Amps. A 20A CDR (continuous discharge rating) battery will allow you to operate safely through the whole range of wattage/voltage.
Here are some options for 20A batteries (in descending mAh):
- AW 3000 mAh 20A CDR
- LG HG2 3000 mAh 20A CDR
- Samsung 30Q 3000 mAh 20A CDR
- Sony VTC5 2600 mAh 20A CDR
- LG HE2 or HE4 2500 mAh 20A CDR
- Samsung 25r 2500 mAh 20A CDR
The mAh stands for
milli-Ampere-hours and indicates how much electric charge the battery can provide. For example, if you discharge your battery through a circuit that requires 1 milli-Ampere of current it will last 2500 hours before the battery runs down (if the mAh of your battery is 2500). The higher the mAh, the longer your battery will last before it needs charging.
If you are interested in learning more about batteries check out some of
@Mooch's battery blogs. He's one of
ECF's battery experts as is widely known for his battery testing blogs.
Here are links to some of his blog posts:
BATTERIES - WHERE TO BUY
Only buy batteries from a reputable supplier (not ebay or Amazon) as there are many counterfeit batteries being sold. Here are several reputable battery suppliers in the US.