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    Manual Stage charge for 12v SLA with a variac & car charger?

    Lets say I have 4 12v, 7ah SLAs that I want to charge in parallel. I don't have a decent smart charger yet. Can I do a 3 stage charge MANUALLY by using a variac and a car charger? I use two multimeters -- one to monitor volts, one to monitor current draw (its rated for 10 amps and run in...
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    Batteries: some hot, some not. What gives?

    Alright, thanks! My attitude is definitely "go for it". So the batteries that are getting hot are the ones doing the work. They'll be kept. I'll consider the ones that end up cool, low voltage as parasitic and toss them. I'll probably try to figure out how to load test them to confirm my...
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    Batteries: some hot, some not. What gives?

    yikes... sorry, that was dumb. SLA, clyte dc brushed 409 in a 700c wheel, no controller, 35 amp toggle after a 30 amp fuse. I don't know how many amps I'm pulling. The only meter Id be willing to throw in series and ride is rated for 10 amps. I'm thinking Id let the smoke out if I tried...
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    Batteries: some hot, some not. What gives?

    Alright, dumb question, maybe. Hope this is the right forum. This morning I ran a nominal 54 volts -- measured 59.4 at the start of the ride. At the end of the ride -- immediately post ride -- I measured 51v. Pulled the pack apart and found some batts with significantly (2v) lower voltages...
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    Shenzhen (ecrazyman) Controller Information

    I won't pretend to understand everything... but AWESOME thread. Love the LVC hack. I may just buy a controller now!
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    Shenzhen (ecrazyman) Controller Information

    I won't pretend to understand everything... but AWESOME thread. Love the LVC hack. I may just buy a controller now!
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    Intro: newbie with homebuilt 700c/brushed motor ebike

    Hi all. First Post -- Been lurking around awhile -- thanks for a great resource! I'm running a pretty tame setup compared to a lot of you. A front drive, brushed crystalyte ("409" wind?) on an old Peugeot 10speed frame. 700c wheels, Low RR 35c tires at about 90psi, single speed freewheel...
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