[MudDog]

I'm sure others with more battery expertise will jump in, but if you look at the specs of that battery it only rated at 68 amp hours.


From what I've read, batteries fall into a couple of categories:

1) Those that can provide A LOT of power for a SHORT duration (like starting a car - the Diehard can provide 880 cold cranking amps)
2) Those that provide much less 'sudden' power, but instead provide power over a long period of time - such as those used to power electric golf carts.

What works to start a car doesn't neccessarily work well to power your TM over 4 days while boon-docking. Likewise, what powers your TM well, may not start a car well (or at all).

Other batteries have much higher amp hour ratings. I have 2 6Volt Interstate 2200UTL's that are rated at 232 amp hours.

So, if you're looking for the TM battery charge to last longer, you may want to look at something with a higher amp/hour rating. The type of battery and the use also factors into how long the battery will last.