Comparison · Battery packs and power banks

M18 battery or 2P 6400 pack

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Capacity: 2P 6400 pack (5957 mAh vs. 3670); Energy: M18 battery (65 Wh vs. 21.48); Test current: M18 battery (10 A vs. 6.7).

Model	M18 batteryMilwaukee · 2021Read review →	2P 6400 pack2019Read review →
Capacity, mAh	3670	5957
Energy, Wh	65	21.48
Test current, A	10	6.7
Review conclusion	Not recommended	With reservations

Only in one review: Voltage 18 V (M18 battery); Resistance 15 mΩ (M18 battery); Weight 655 g (M18 battery).

M18 battery: The case and protection are decent, but capacity is about 4 Ah instead of the claimed 6 Ah; the author advises against buying it.

2P 6400 pack: Capacity is slightly below the rating; protection trips at 6.7 A, and measured capacity is 5957 mAh.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.