New, low cost 100Ah 12V LiFePO4 battery !

rlw999 wrote:
Given the power density of batteries and the danger of a fire in an RV, I'd never buy a cheap off-brand.


To put it in perspective:

A 100Ah 12V battery has around 1.2KWh of energy stored in it, 1 Watt-Hour has 3600 Joules of energy, so 1.2KWh has 1.2 * 1000 * 3600 = 4.3 million Joules of energy.

A hand grenade contains around 50g of TNT, at 4,000 Joules/g, that's around 200,000 joules.

So a 100Ah battery has the same energy as around 20 hand grenades. Granted, the battery is not going to release all of that energy at once, but still, a failure can do a lot of damage.

Here's what happens when you puncture one (no explosion, but an impressive jet of flame): https://www.youtube.com/watch?v=07BS6QY3wI8

the first test he did shorting the termanals, which did nothing aside from melt the termanals, would have caused a lead acid battery to expload. right there it is safer than a normal battery, as that would be the most comon issue from people working around there batteries. and it isnt like the old nickel metal hydride batteries that are subject to thermal runnaway, but I guess if you go around shoving metal spikes through the battery..... maybe thats why they are in a protective case?

Steve