00:00If you're building your own lithium battery pack, one wrong move can turn your project into a fire
00:04hazard, so today I'm showing you the top 5 battery protection modules for Li-ion packs that I found
00:09at seriously unbeatable prices. First up, we've got the 10-piece 3.7-volt 3-amp Li-ion BMS board
00:16for 18,650 cells, and this one is perfect if you're working on a bunch of small single-cell
00:22projects at once. You get 10 of them for just $3.92, which is almost nothing per board,
00:28and with over 4,600 sold and a 4.9 rating, clearly everyone else thinks so too.
00:34If you're just getting started with lithium cells, this is the cheapest way to protect them properly.
00:40Next is the 4S 14.8-volt BMS with 8-amps continuous and 20-amps peak,
00:45plus a 10K NTC temperature sensor, all on a shared port design.
00:50The built-in temperature sensor is the standout here because it actually monitors heat and
00:54cuts things off before they get dangerous. At only $3.77, it's a no-brainer for any 4-cell pack,
01:02and the 4.7 rating from over 4,500 buyers backs that up.
01:07Number 3 is the big one, a 13-is 48-volt 50-amp BMS board with balancing,
01:12built for e-bikes and electric car battery packs. This thing handles real power, and the balancing
01:18feature keeps all your cells healthy and evenly charged over time. It's $12.45, which sounds like
01:25more, but for a 50-amp board at this quality, with a 4.9 rating and 4,300-plus sold,
01:30it's honestly a
01:31steal. Coming in fourth is a super-flexible option, a 3S, 4S, or 5S BMS rated up to 100 amps
01:38with
01:39balance charging, and it works with 12, 16.8, 18, and 21-volt setups. That kind of versatility
01:46in current handling for just $4.26 is kind of ridiculous. If you want one board that fits
01:52almost any small pack configuration, this is the one, and a 4.8 rating from over 4,000 buyers tells
01:58you it delivers. And rounding out the list is the 4S 14.8-16.8-volt high current BMS handling
02:0520 amps,
02:05designed specifically for 18,650 packs. It's a rock-solid, straightforward protection board
02:13that just works, which is why it holds a 4.9 rating. For $5.73, you're getting peace of mind
02:20for your pack without overthinking it. And there you have it, 5 protection modules that keep your
02:25lithium build safe without emptying your wallet. All the links are down in the description, so go grab
02:31the one that fits your project, and if this helped you out, hit that like button and subscribe
02:35for more.
