Understanding Battery Power Density - Battery Basics Playlist | Ep: 6/7
October 10, 2025 · 25 min · 8K views
Man measures large Epoch battery as woman watches closely
What this video covers
Nate and Steph calculate watt-hours-per-cubic-inch power density for every lithium battery sold through shop.explorers.life, measuring physical dimensions to the nearest half inch and using nominal voltage (12 V, 24 V, or 48 V) times amp-hours divided by cubic inches.▶ 2:40 Batteries measured in hand include a Victron Smart Lithium 200 Ah 12 V (12.5 × 6.5 × 9.5 in), a Battle Born 100 Ah 12 V, a SOK 314 Ah 12 V, an Epoch 460 Ah 12 V (2.69 Wh/in³), an Xpeon 360 240 Ah 12 V, a Rich Solar 100 Ah 48 V rack battery, and a Battle Born GC3 270 Ah 12 V. The GC3's mounting brackets skew its measurement low.▶ 3:06 Across the full store catalog, the Dakota Lithium 12 V 320 Ah battery ranks first in power density, edging the Victron 24 V 300 Ah into second and the Dakota Lithium 12 V 640 Ah into third.▶ 17:38 Cylindrical cells (Battle Born) leave air gaps that reduce density versus prismatic cells (Victron); an internal BMS adds bulk.▶ 0:49 A secondary price-per-power-density index finds the Rich Solar 12 V 100 Ah battery the winner at roughly $167 per 2.15 Wh/in³.▶ 22:56 Nate recommends a single large battery over multiple smaller ones to reduce wiring complexity.▶ 14:39
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