I picked up a handful of small 12V lead acid batteries (CSB HR 1221FW F2)and I'm having trouble figuring out the specs, namely the Ah and watts, so I can figure out what project they can be used in. The spec sheet says 12V (6 cells),21W @15min-rate to 1.67V per cell, 60/90A (5 sec) max discharge current, 249A short circuit current and 2.1 max charge current.
- The "21W @15min-rate to 1.67V per cell" confuses me...does this mean each cell is 1.75 Ah (21W divided by 12V)? If so, then each battery is 10.5 Ah (1.75 Ah x 6 cells)? If not, how do I properly break down that verbage to get Ah?
- When 8 of these batteries are in paralleldoes that mean this battery pack's maxdischarge current/rate is480A continuous,720A burst (5 sec)and the maxcharge current/rate is 16.8A???