How to recharge a battery with a manual battery charger
Not many issues charging big lead acids. Just hook the sucker up, turn it on, wait a while, test the battery for either loaded voltage or charge current (&lt;0.3A), then disconnect or continue. Some issues I've had with standard sealed lead acids:


Killing the battery separates the water from solute, which can then freeze. This happens if it dies in the cold. It's basically pooched at this point, but there's nothing stopping you from trying to thaw it out and charge it back up. Sometimes they still work!
Don't use the boost function, if there is one, to attempt to charge the battery more quickly than usual. This is strictly for boosting, and will reduce a battery's MTTF. Note that maximum charge current is 2.16A.
Charge it in a ventilated area. I know it's sealed, but I do this anyway, just in case!
Don't put it on a concrete floor -- stick a piece of cardboard or wood under it. This has been proven a myth a dozen times over, but I still do it to keep Murphy at bay.
Don't use too large a maintenance charge. The battery datasheet states 13.5V-13.8V float voltage.


Why did you get a manual charger, anyway? I'd definitely screw that up within a season.