{"product_id":"lenco-nav400-replacement-battery-37v-1400mah-li-ion","title":"Lenco Nav400 Replacement Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenco Nav400 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1400mAh (5.18Wh) lithium-ion cell for the Lenco Nav400 portable GPS navigator. It replaces the original battery when capacity has degraded and the unit no longer holds a charge through a full journey. Physical dimensions are 50.22 × 36.88 × 6.52mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNav400 battery fit:\u003c\/strong\u003e\n    The Nav400 runs a single-cell 3.7V Li-ion pack at this form factor. No multi-cell balancing or proprietary BMS handshake is involved — the protection circuit sits on the cell itself and handles over-charge, over-discharge, and short-circuit cutoff directly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the bench, confirmed the protection circuit trips correctly at the low-voltage threshold, and verified it returns to normal charge acceptance after a recovery charge from a depleted state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst satellite fix after fitting:\u003c\/strong\u003e\n    After fitting this cell, power the Nav400 on outdoors and let it run a full cold-start satellite acquisition before driving. A cold start after full power removal can take 5–10 minutes for the first fix — subsequent warm starts will be under a minute once the almanac data is cached.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reduced at low battery on the Nav400\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome GPS units, including compact navigators in this class, step down receiver sensitivity when the cell voltage drops below a certain threshold. This reduces current draw but degrades position accuracy — you may see the position dot drifting or snapping to incorrect road segments. The Nav400 display may still show two or three battery bars when this happens, because the indicator is not calibrated to the actual cell voltage curve. A fresh cell restores full receiver power and stabilises the fix.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNav400 shutting off without warning during navigation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAn aged cell loses capacity but also develops higher internal resistance, which causes voltage to sag sharply under the load of the GPS receiver and backlit display running together. The unit hits its low-voltage cutoff while the battery indicator still shows partial charge, so there is no visual warning before shutdown. This is a cell-condition issue, not a firmware fault. Fitting a new cell with lower internal resistance eliminates the sag and restores the expected shutdown sequence at the correct threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377724358746,"sku":"BWCS-BM6300SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377724391514,"sku":"BWCS-BM6300SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377724424282,"sku":"BWCS-BM6300SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BM6300SL_1.webp?v=1778771839","url":"https:\/\/batteryweb.com\/products\/lenco-nav400-replacement-battery-37v-1400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}