Gardena AccuCut Grass Shears 3.7V Replacement Battery

My Gardena AccuCut shears stop cutting after a few passes even though the battery shows charged — what's wrong?

At 3.7V single-cell lithium-ion, the battery management circuit will trip a low-voltage cutoff if the cell voltage sags under load, even when it reads "full" at rest — this is the most common cause of early shutoff on light-draw tools like grass shears after the original cell degrades. A replacement cell that's been sitting in storage can show the same symptom if it arrived deeply discharged. Charge the new battery fully, then let it cool completely before the first cut. If it still cuts out early, check the resting voltage with a multimeter — a healthy 3.7V Li-ion cell should read between 4.0V and 4.2V after a full charge.

The blades on my AccuCut are moving slower than they used to even with a new battery fitted — is that a battery problem or the tool?

Slow blade speed on a fresh battery usually points to one of two things: the replacement cell's internal resistance is higher than spec, or the blade pivot and gear teeth have built up enough grass residue to increase mechanical drag noticeably. We've seen this on bench tests where a high-resistance cell delivers the right open-circuit voltage but drops sharply under the load of the cutting mechanism. Clean the blade pivot and teeth first with a dry brush, then retest — if speed is still reduced, the cell may not be delivering current cleanly under load.

My Gardena grass shears sat unused all winter and now the battery won't hold a charge after I replaced it — did I get a dud?

This is a storage self-discharge issue more often than a faulty cell. Li-ion cells at 3.7V that drop below roughly 2.5V during long storage can trigger a protection circuit that makes the battery appear dead to the charger. Try a slow, uninterrupted charge for the full recommended cycle without interrupting it partway through — some protection circuits need a sustained trickle to recover. If the charger still shows no activity after 30 minutes, measure the cell voltage directly; anything below 2.5V means the cell is past recovery and the replacement itself needs to be swapped.