Review on WAITLEY 18V 5.0Ah Replacement Battery For Makita Lithium-Ion Power Tools - Compatible With BL1830, BL1840, BL1850B, BL1860 Models - LED Indicator Included by Eric Jackson

You could purchase real Makita batteries ( https://amzn.to/2XTWI77 ), but they are pretty expensive.I used a Electronic load tester ( https://amzn.to/2XW3WY9 ) and put a 10A load on the battery.I got 3.84Ah or 59.9Wh out of the battery (a small tool like the LXFD01Update: 4/28/2020The battery has died. I took it apart and found 8 of the 10 18650 cells had died (the cells are pink no-name brand listed at 3.7V and 7.4Wh). The scary part is that there are NO balance leads on these batteries! This can cause serious problems if you use these batteries for long heavy draw downs. The cell pairs (it's a 5S2P battery configuration) can become different voltages after several charge cycle. In my case 4 pairs were 0 volts and the remaining pair was 4.6V! (normally 4.2V is the Max 18650 cell voltage) I'm lucky they didn't explode. The other poor design choice is that the "BMS" board is powered off only one pair of cells. So if you leave the battery unused for a long time, the cells can go below the 2.5V minimum voltage.I guess I would recommend the more expensive OEM batteries ( https://amzn.to/2yRmcYo )