rickpaulos

I took the covers off for photos. 36v pack with 18650 cells. no mention of chemistry but I'm sure they are li-ion. The 3 pin connector has 2 reds on one pin and 2 blacks on another pin and the 3rd pin is vacant. I would think the bcm (battery control module) would regulate charging so the charger is just a dumb ac to dc converter. There are no feedback lines to the charger. I see some of the charger ports are threaded (this one is) and some chargers have threaded rings to hold the plug in and others are just press in rubber. With all the news of spontaneous fires and explosions, I think a threaded on charger plug would be more prone to twisting the socket that could cause a short circuit. But that's on the charger side of the bmc. That wouldn't cause a short of the li-ion battery pack which can be catastrophic. I tried this unbranded hoverboard out for the first time despite the battery being very low and the alarm chiming. It works so it's worth getting a charger for. My plan was to tear it apart and use the guts to make an electric 2 wheel bicycle that I can handle safely. looking on line, I see many chargers. Some state "for lead-acid" in the specs but I think the sellers are more clueless than me.

What should the nominal charger voltage be for a given battery pack voltage? Is there a general guideline? How much over is needed to charge? Car alternators usually charge at 14.2 to 14.4 volts for a 12 volt battery. My garage auto battery charger says it's 12 (or 6) volts on the switch settings but it measures higher with no load. The meter only shows amps. Should I just go by the labels and match?

Okay, image linking is different from other forums.

I bought a hoverboard from an estate sale. No charger. Still has the tire flashing on the tire tread so I don't think it was used much at all. Has some paint splatter on it. Chromeplated body. no stickers or labels of any sort. 3 prong round plug. Battery has enough life to turn on but it beeps and displays a red battery light. What brand is it? Voltage of charger needed? I'm assuming not all brands take the same charger or have the same plugs. thanks. [url=https://flic.kr/p/2khioNf][img]https://live.staticflickr.com/65535/50723928666_32b9290e9e_c.jpg[/img][/url] [url=https://flic.kr/p/2khioPs][img]https://live.staticflickr.com/65535/50723928736_cb5c08d23e_c.jpg[/img][/url] [url=https://flic.kr/p/2kheBUR][img]https://live.staticflickr.com/65535/50723192333_025d28693a_c.jpg[/img][/url] [url=https://flic.kr/p/2khioMy][img]https://live.staticflickr.com/65535/50723928626_2ea05a0330_c.jpg[/img][/url] [url=https://flic.kr/p/2khiRpH][img]https://live.staticflickr.com/65535/50724018187_0f06024e1a_c.jpg[/img][/url] [url=https://flic.kr/p/2khioPh][img]https://live.staticflickr.com/65535/50723928726_4d957313cb_c.jpg[/img][/url]