I use these to maintain my batteries. Once you have the right tools it can save you a lot of money in the long run. Plus if you fly some IFR you will know that your battery does in fact have the required capacity. The Gill 242's seem to like a high constant current in initial charge. Up to 35v and 8 amps. For just a little while. Lots of outgassing [Hydrogen], please no sparks are ciggys when doing this. This is explained in the MX section on the Gill site. The Freas No.1 is my first tool of choice. I wonder who designed the C337 Battery box? Quite a durable work of art.
1.
http://www.chiefaircraft.com/airsec/...ryService.html $24.50
2.
http://gillbatteries.com/maintenance.aspx FREE
3.
http://www.altestore.com/store/Charg...CHARGER/p1055/ $209.96
The charger can be used as a apu with a max load of 15 amps.
4.
http://www.powerwerx.com/tools-meter...3-cba-iii.html -$149.00
5.
http://www.powerwerx.com/tools-meter...eter-m300.html
$9.99 Buy 3 at that price and keep one in car, plane and workbench.
The Battery load test is required. This Load tester unit is worth the money. Ability to overlay respective graphs for charting battery. Works on any battery.