About this replacement
Gardena Cordless Grass Shears — 4.8V Ni-MH Replacement Battery
This is a 4.8V 3000mAh Ni-MH replacement battery for the Gardena Accu4 platform. It fits the 2517 cordless grass shears — a handheld tool used for trimming lawn edges and cutting grass in tight spots. Rated at 14.4Wh, this cell pack matches the original Accu4 / TBGD430MU specification exactly.
- Compatible with 2517, Grasschere, Grassschere, Grasschneider: These models share the same Accu4 battery platform — same 4.8V rail, same connector format, and the same BMS logic for charge termination.
- Bench tested on actual hardware: We ran full charge and discharge cycles — the BMS held voltage steady under cutting load and tripped cleanly at the low-voltage cutoff without cell reversal.
- First charge after storage: Ni-MH cells that have been sitting need a full charge before first use. Run two to three full cycles to condition the pack and restore full capacity.
Why capacity matters more than voltage in a 4.8V grass shears pack
At 4.8V, the power ceiling is fixed — the motor draws what it draws. Capacity at 3000mAh determines how many cuts you get before the voltage sags enough to slow the blades. Upgrading from a worn 1500mAh original to a 3000mAh pack roughly doubles the usable charge window at the same voltage. Ni-MH holds voltage relatively flat through most of the discharge curve, which keeps blade speed consistent until the pack is nearly depleted.
Shears feel weak before the battery indicator drops — here's why
Aged Ni-MH cells develop high internal resistance before they show obvious capacity loss. The motor still runs, but voltage sags under the momentary load of cutting through thicker grass stems. The blades slow noticeably even though the charger showed a full pack. Replacing the cell pack restores low internal resistance, and the blades return to full cutting speed under load.