My lead pigs in my Vienna have died already. They were vrla batteries. Maybe my Pihsiang 3A charger is the wrong voltage for vrla.
Burgerman wrote:Generic 10A charger will charge at 3.65v x 8 or a too high 29.2V and then the BMS will keep switching the 10A on/off repeatedly for a few hours while it murders the cells a bit, as it attempts to balance them with inadequate 50 to 100mA balance circuit and repeatedly allowing the high cells to reach 3.700v or more over and over... Enjoy! Best not to watch it do that!
I've been looking at a pair of 12V drop-in LiFePO4 batteries for my little Vienna, because of the weight of lead, not the performance. That little wheelchair
. I'm sure they must take a battery box and build a chair to fit it.
It's easy to find fairly cheap-ish LiFePO4 mobility batteries, but more of a problem to find a suitable charger. On eBay all the 24V chargers have an actual output of 29.4V which is too high, if I understand correctly. I think that charge Voltage is for lipo, not LiFePO4 batteries. The drop in mobility LiFePO4's have a charger included and they tell you not to use anything else (the batteries would be a pair in series in a box, so I'm not too sure how that would work) I'm guessing it's going to be 29.4V. so that would be a double whammy against those drop-ins
Not one of the mobility chargers I have around here has any specs or online info, they just say output is 24V. And the same goes for mobility chargers for sale. I found a 28.8V charger online, as it is not a "mobility" charger, there are some specs but no XLR plug. Would that help increase the longevity of my batteries? I'd need to put an XLR plug on it (soldering - ugh
) and then I think my Vienna would be p&p and portable.