Power Tool Batteries Jan 2023 Test: Which Brand Wins?

(claims 30% more power, runs cooler)

start, 23.6 at min 2 and 4, 23.4 at min 8, 23.3 at min 10, 22.75 at min 12, 22.42 at min 14, finished just under 16 min, battery temp 111F

start, 24.9 at min 2, 23.6 at min 4 (same as regular), 23.4 at min 6, 22.9 at min 8, 22.8 at min 10, 22.3 at min 12, 22.02 at min 14, lasted just over 16.5 min, battery temp 106.4F (5F cooler than regular)

start, 21.8 at min 2, 22.2 at min 4, ~22.4 at min 6-8, 22.6 at min 10 and 12, out of juice ~15.5 min, battery temp 82.5F

start, 22.5 at min 2, 22.6 at min 4, 23 at min 6, holds ~23.4 from min 8-12, 22.6 at min 16, outlasted regular by about 1.5 min, battery temp 88.6F

start (300 fpm slower than high-output at that point), 7561 at min 1, 7782 at min 2, 7806 at min 3, 7913 at min 4, 7744 at min 5, 7570 at min 6, gave up at very close to 7 min (about 21 sec longer than high-output), temp around 80F (about 40F cooler than high-output)

start (900 fpm slower than its own warm start), 7990 at min 1, 8042 at min 2, holds through min 3-4, drops to 7586 by min 6, out of juice at 6 min 39 sec, temp around 122F

too cold to power the saw initially; description says regular battery pulled from freezer struggled

performed a lot better than the frozen regular battery but the saw was still extremely underpowered and stalling; finished a cut only after supporting some of the bar weight, no exact time given for the Ultimate Output itself (the 23.5s figure quoted is for the regular Kobalt after support was applied)

start, 22.21V at 10 min, 21.71V at 15 min, 21.29V at 20 min, 20.99V at 25 min, 20.74V at 30 min, 20.44V at 35 min, 20.11V at 40 min, test stopped at 18V cutoff at 45 min; totals 3.72 amp hours, 77.4 watt hours

start, 23.51V at 5 min, 22.91V at 10 min, 22.33V at 15 min, 21.77V at 20 min, ~21.15V at 25 min (about same as Extended Run), 20.62V at 30 min (lower than Extended Run), ~20.1V at 35 min, test over at 42.5 min; totals 3.5 amp hours, 73.6 watt hours

not as tall as Extended Run, but longer and wider, 5 cubic inches larger overall

not as long or wide as genuine Milwaukee 8Ah, but a little taller

3.34s, 3.03s, average 3.35s

3.03s, 3.03s; narrator states this is 12% faster on average than the regular battery

too cold to power up the saw at all

performed about the same as the regular battery; also too cold to power up the saw

started weaker than genuine, close to same speed around minute 4, then fell off quickly; ran out of juice at 11 min 48 sec, battery temp 90F

started off stronger than the knockoff, lasted over 4 minutes longer at 16 min 5 sec, battery temp 93.5F

both batteries started slow and needed minutes to warm up; knockoff was outperformed by genuine for the entire test and lasted about 3.5 minutes less

started off stronger and outperformed the knockoff for the entire test, lasted about 3.5 minutes longer

not stated directly; transcript only says the High Performance costs $85, which is $35 more than this regular battery

stalled 3 times, finished first cut in 15.72s; stalled 2 more times, second cut 12.47s; warmed up, third cut 9.22s

9.53s, 9.38s; never stalled during any cut

start, 8450 at min 1 (faster than high-output), 8405 at min 2, 8196 at min 3, ~100 fpm faster than high-output at min 4, 7927 at min 5, 7006 at min 6, finished at 6 min 22 sec, temp about 30F cooler than high-output at 109F

start, 8318 at min 1, ~same at min 2, 8164 at min 3, 7930 at min 4, 7770 at min 5, 7446 at min 6, finished at 6 min 22 sec, battery temp 143F (hot)

Korea-processed cells (further processing in China) per transcript, exact attribution to this product uncertain from phrasing