I've got a Vsrc of 14.97 crossing a LM317 current limiter ( 1.25V / 1.25R = 1A), and at the output of the LM317 I have 14.4V/1A. So far so good.
Next I use a BC239 NPN transistor to switch a P-channel IRF9630 MOSFET with a 4K7 pull-up. Source is wired to 14.4V positive terminal, and I plan to put a charging load on Drain.
My battery is a 12V/9Ah, so charging would be done at ~C/10, and elsewhere I use a zener diode to read the battery's voltage, and cut-off charging at 13.6V, also cut-off loads at 10.8V (that's done with a relay, it's not relevant to this question).
My question is probably simple to answer: What gotchas should I be aware of when charging a >100Wh battery?