Inside the CEENR 8.0Ah Battery

The short answer

The CEENR 8.0Ah replacement battery uses 10 Lishen 21700 lithium-ion cells wired 5-series-2-parallel. Nominal voltage: 18V. Total capacity: 8.0 Ah × 18 V = 144 Wh. Continuous discharge: 40 A. Burst: 80 A.

Why Lishen 21700

Lishen 21700 hits the energy-density and cost balance we need for the high-capacity replacement use case. It's used in EV applications (some BYD packs) so the cell-level quality control is automotive-grade, while the price is 35% under Molicel.

When to choose 8.0Ah over 6.0Ah

• Circular saws — 7¼" blade cutting hardwood draws 25–35A continuous. 8.0Ah gives you ~70 cuts per charge vs 50 on 6.0Ah.
• Grinders — 4.5" cutting wheels draw 30–40A. 8.0Ah runs them 30% longer.
• Blowers and leaf vacuums — 20–30A continuous for 20+ minutes. 8.0Ah is the right call.
• You just want fewer charge cycles per day — runtime matters more than weight.

When 6.0Ah is fine

• Drills, drivers, impact wrenches (most jobs draw < 20A).
• Anything you carry overhead for long stretches — 6.0Ah is 20% lighter.
• Tighter budget — 6.0Ah is $20 less per battery on average.

Coming soon — full breakdown

This article will expand with thermal imaging under continuous saw cuts, side-by-side runtime tests against OEM 8.0Ah batteries (DeWalt DCB208, Makita BL1850B, Milwaukee 48-11-1880), and a teardown showing the Lishen cells and BMS layout.

Last updated: this is a stub awaiting the full lab-test writeup. Email [email protected] with questions in the meantime.