Flashpoint FPLFSMZLRB Zoom Li-ion Flash Replacement Battery 11.1V 2000mAh

Flashpoint Zoom Li-on Flash / VB-18 / Zoom Li-on R2 TTL — 11.1V Li-ion Replacement Battery (FPLFSMZLRB)

This 11.1V, 2000mAh (22.2Wh) lithium-ion cell replaces the factory battery in the Flashpoint Zoom Li-on Flash, VB-18, and Zoom Li-on R2 TTL portable strobe units. It feeds the capacitor recharge circuit that drives each flash discharge cycle. Voltage and capacity match OEM spec exactly — no derating, no substitution.

• Zoom Li-on Flash, VB-18, and R2 TTL compatibility: All three units share the same 11.1V three-cell architecture, connector pinout, and BMS handshake protocol — which is why a single replacement cell covers the entire lineup. The BMS on each unit reads cell voltage and internal resistance before enabling the capacitor recharge circuit.
• Bench tested on actual hardware: We cycled this cell through sustained full-power flash sequences and monitored the BMS cutoff threshold. The protection circuit held stable across repeated high-current capacitor recharge draws without tripping prematurely or logging a fault state.
• First-install power cycle on the Zoom Li-on R2 TTL: After fitting this cell, power the flash unit fully off — not just standby — before taking the first shot. The BMS handshake that unlocks capacitor charging only completes correctly from a cold start. Hot-swapping mid-session and firing immediately can leave the unit in a fault state that mimics a dead battery.

Flash output stepping down after 10–15 full-power shots

Capacitor recharge draws a high current burst from the cell every cycle. At full power, that current pull is sustained and aggressive — more so than most battery-powered devices. If the cell's internal resistance is elevated, voltage sags under that load and the BMS interprets it as a low-charge condition, stepping the unit to a lower power tier to protect the cell. A fresh cell typically resolves this within the first few cycles as the electrochemistry stabilises. If output stepping continues past five full-power cycles on a new cell, check that the battery contacts are clean and fully seated — a partial connection raises effective resistance at the terminal.

Recycle time between flashes noticeably slower than the old cell

New lithium-ion cells often show higher internal resistance straight out of packaging — this is normal and not a defect. Higher internal resistance limits the peak current available for capacitor recharge, which directly slows recycle time. Run five to eight full conditioning cycles at mid-power before drawing conclusions about recycle speed. After conditioning, internal resistance drops and recycle time returns to the rate the unit's spec sheet describes.