About this replacement
Wolf Garten Cordless Hedge Trimmer — 3.7V Li-ion Replacement Battery
This 3.7V, 5200mAh lithium-ion pack replaces part numbers 7085066, 7085-066, 7085-061, and 7085-918. It fits the Wolf Garten Power 80 Plus and Li-Ion Power 80 cordless hedge trimmer range. Capacity ships at 19.24Wh — slightly lower than the original 22.2Wh spec, which is standard across replacement cells at this voltage tier.
- Cross-series Power 80 compatibility: The 2007 Series A, 2007 Series B, and 2008 Series B models all share the same 3.7V single-cell voltage rail, connector pinout, and BMS communication protocol — which is why one pack covers the full range.
- Bench tested on actual hardware: We ran full charge/discharge cycles — the BMS held voltage steady under motor load and triggered the low-voltage cutoff cleanly without drop-off artifacts on the blade drive circuit.
- First charge after storage: Lithium-ion cells discharged during shipping perform better after a full conditioning charge before first use — skip partial top-ups on the initial cycle.
Why single-cell 3.7V packs age faster in cutting tools
Hedge trimmers draw sharp current spikes when blades contact dense stems. A single-cell pack at 3.7V has no voltage headroom to absorb those spikes cleanly. Over time, this compresses the cell's usable capacity from both ends. Storing the trimmer fully charged between seasons accelerates this — aim for around 50% charge if storing longer than a month.
Trimmer powers on but blade stops mid-cut — what's happening
This usually means the BMS is triggering an overcurrent cutoff, not a dead battery. Dense or wet growth forces the motor to pull more current than the protection circuit allows. Let the pack rest for 60 seconds, then resume with lighter passes. If it cuts out repeatedly on normal growth, the cell's internal resistance has likely risen — that's the signal the pack needs replacing.