About this replacement
Andis Cordless Envy Li Hair Clipper — 3.7V Li-ion Replacement Battery (FBL-16)
This 3.7V, 2600mAh (9.62Wh) lithium-ion battery replaces the OEM FBL-16 cell in the Andis Cordless Envy Li Hair Clipper. It fits the Cordless Envy, model 8224, and the Cordless Envy Li Switch Sled. When the original cell degrades and cutting power drops mid-session, this is a direct swap to restore full motor output.
- Envy Li platform fit: The Cordless Envy Li series shares a single 3.7V cell format across the standard Envy, 8224, and Switch Sled variants. Same housing dimensions (66.50 × 20.50 × 20.00mm), same connector, same BMS handshake — one replacement covers the range.
- Bench tested on actual hardware: We cycled this cell through the Envy Li's charge circuit and confirmed BMS cutoff at the correct low-voltage threshold. The protection board responded normally to both charge termination and discharge cutoff without error flags.
- Charging port drying before reconnect: The Envy Li is used in wet salon environments. Dry the charging port completely before docking — moisture bridging the charging contacts triggers a BMS protection fault the clipper reports as a dead battery, not a charging error.
Capacity fade from daily partial charging on the Envy Li
Many stylists top up the Envy Li after every client session rather than letting the cell cycle fully. Li-ion cells charged repeatedly from 60–80% develop shallow-cycle degradation — the cell's usable range narrows and the indicator starts drifting from actual charge state. Over 200–300 partial cycles, the cell reads full but delivers noticeably less cutting time per session. Replacing the cell resets this. After fitting a new cell, run two or three full discharge-recharge cycles to let the indicator recalibrate.
Motor speed dropping before the indicator reaches empty
The Envy Li's motor draws a sharp current spike on startup and during cuts through thick hair. An aged cell can't hold voltage under that load even when the indicator still shows charge remaining — voltage sags below what the motor needs, and cutting power drops or the clipper stutters. This is a cell-impedance problem, not a motor fault. A fresh 2600mAh cell with low internal resistance maintains the voltage rail through those spikes. If the clipper restores full blade speed immediately after swap, the original cell was the cause.