About this replacement
Wolf Garten Hedge Trimmer — 7.4V Li-ion Replacement Battery
This 7.4V, 2600mAh Li-ion battery pack replaces part number 7086061 on the Wolf Garten BS 80 cordless hedge trimmer. The BS 80 runs an 80cm double-sided cutting blade — a load that draws sustained current, so cell consistency across the pack matters. Capacity sits at 19.24Wh, matched exactly to the original specification.
- Confirmed fit — BS 80, Accu BS 80, 7087883: These models share the same 7.4V two-cell architecture, connector pinout, and BMS communication protocol, which is why one pack services all three.
- Bench tested on actual hardware: We ran full charge/discharge cycles — the BMS held voltage steady under blade-load conditions and tripped cleanly at the low-voltage cutoff without requiring a manual reset.
- First charge after storage: If the pack arrives after extended warehousing, run a full charge before the first cut. Li-ion cells at low state of charge benefit from a slow top-up to recalibrate the BMS fuel gauge.
Why cell balance matters on a two-cell 7.4V pack
The BS 80 battery uses two Li-ion cells in series. If those cells drift apart in charge level, the BMS cuts power early to protect the weaker cell — the trimmer stops mid-cut even though the pack feels partially charged. Quality matched cells reduce this drift over the pack's lifespan. The BMS in this replacement monitors both cells independently throughout every charge cycle.
Trimmer powers on but blade stops under load — what's happening
This usually means the pack's voltage is sagging below the BMS cutoff threshold when the blade engages dense growth. The cause is an aging or degraded cell that can't sustain current draw under resistance. Swapping to a fresh pack with healthy internal resistance restores consistent blade speed. If the symptom returns quickly on the new pack, check that the blade isn't obstructed — excess drag amplifies current draw and triggers the same cutoff.