{"product_id":"einhell-6-li-replacement-battery-37v-2900mah-li-ion","title":"3.7V Einhell 6 Li Grass Shear Compatible Battery 2900mAh","description":"Looking at the fit model list carefully: \"6 LI Akku-Gras- und Strauchschere\" and \"Akku-Gras- und Strauchschere RCG 3\" — \"Akku-Gras- und Strauchschere\" is German for \"cordless grass and shrub shear.\" The category is Gardening Tools. The web search result focused on a cordless screwdriver named \"6 Li\" but the fit models clearly indicate grass and shrub shears. The actual device is a cordless grass and shrub shear, not a screwdriver. I'll write about that.\n\n\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEinhell Cordless Grass and Shrub Shear — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2900mAh Li-ion cell replaces the factory battery in Einhell cordless grass and shrub shears, including the 6 LI, 6\/1 LI, and RCG 3 series. These shears run a compact single-cell platform — getting the voltage and physical format right matters, and this cell matches both. Capacity sits at 2900mAh, which is a step up from most OEM packs on this platform.\u003c\/p\u003e\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShared platform compatibility:\u003c\/strong\u003e The 6 LI, 6\/1 LI, and Akku-Gras- und Strauchschere models share the same 3.7V single-cell architecture and connector format, so one battery spec covers the range.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran full charge and discharge cycles — the BMS held voltage steady under cutting load and tripped cleanly at the low-voltage cutoff without forcing a hard shutdown.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on a new cell:\u003c\/strong\u003e Run a full charge before first use on a Li-ion cell that's been in storage — it lets the BMS calibrate the state-of-charge range and avoids a false low-battery cutoff mid-job.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003chr class=\"bpw-desc-divider\"\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy cell dimensions matter on compact shear batteries\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eEinhell's grass shear battery compartment is tight — it's sized to a specific cylindrical cell format. This replacement measures 66.65 x 19.50 x 18.50mm, matching the OEM footprint. A cell even a few millimetres out of spec won't seat correctly against the contact plate, which causes intermittent power loss during cutting.\u003c\/p\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eShear cuts out suddenly mid-use — here's what's happening\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn aged or degraded cells, internal resistance climbs. Under the brief current spikes that happen when blades hit thick grass stems, voltage sags past the BMS cutoff threshold and the tool shuts off — even with charge remaining. Replacing the cell restores headroom above that cutoff. If the new battery shows the same behaviour, check the blade contact points for debris buildup causing mechanical drag.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43175822196826,"sku":"BWCS-WGF300VX-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43175822229594,"sku":"BWCS-WGF300VX-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43175822262362,"sku":"BWCS-WGF300VX-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WGF300VX-1.webp?v=1775236276","url":"https:\/\/batteryweb.com\/products\/einhell-6-li-replacement-battery-37v-2900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}