So, I'm thinking that adding some cells to my XM-3500Li might be worth a try as a first level upgrade, but I must admit I'd really like to have a BMS (that I don't have to solder together and is at least a somewhat reasonable cost) available before doing it. (Plus I'm curious to see how all the other temperature tests other folks are doing before I submit my motor to the 100 degree, 100% humidity August weather around here in new Orleans.) But I did see some discussion here on the use of a Voltphreaks single cell LiFePo4 charger for doing individual cells to balance them out as a cheap alternative. So I bought a couple (//s.p10.hostingprod.com/ [at] www.voltphreaks.com/ssl/catalog/product_info.php?cPath=3&products_id=28">https://s.p10.hostingprod.com/ [at] www.voltphreaks.com/ssl/catalog/product_info.php?cPath=3&products_id=28) and thought I'd like to dig into maybe trying to start doing this cell by cell sometime soon.
Now this thing has normal little round plug (like you might use on many types of electronic equipment) which I will obviously need to cut off and split out the wires. I also know I'll need to make sure which wire is the positive side and which the negative (and a strip of red tape might help me see it on the fly.) Presumably the battery to be charged will need to have any leads on it removed before connecting to this little charger, but are there any recommendations for making the connection? Obviously I could just strip the wires and try to wrap them around the battery terminals, but do other folks have some recommendations on little ends I could put on that maybe I could get at Radio Shack or online somewhere? And are there any other considerations I should know about charging this way? Does this charger shut off appropriately for these batteries when they are fully charged without overcharging them?
And if I did want to add batteries into the mix eventually, how do you do that? Let's say I started by adding 1 battery. How would I connect it into the mix, meaning which battery (or batteries) terminals would I need to connect to? What about if I added 4 batteries?