{"product_id":"typhoon-myguide-3500-mobile-replacement-battery-37v-1300mah-li-ion","title":"Typhoon MyGuide 3500 Mobile Replacement Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTyphoon MyGuide 3500 Mobile \/ 6500 Series — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1300mAh Li-ion battery replaces the original cell in the Typhoon MyGuide 3500 mobile, 3500 Lidl, Guide, and 6500 series portable GPS navigation units. These are handheld PDA-class devices from the mid-2000s. Dimensions are 50.00 × 35.90 × 8.50mm — measure your original before ordering if you are unsure of your exact variant.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMyGuide 3500 and 6500 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector orientation, and 3.7V single-cell architecture. One replacement cell covers the full range listed above without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a PDA-class test rig. The protection circuit handled over-charge cutoff and low-voltage lockout correctly at both ends of the curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRAM state before you pull the battery:\u003c\/strong\u003e\n    Sync all open files and application data to a host PC before removing the old cell. The MyGuide stores active map state and user waypoints in RAM powered directly by the main battery. A full power loss — even for a few seconds — clears that data permanently.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MyGuide 3500 won't boot after a new battery is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell ships with a partial charge — typically 40–60% state of charge for transport safety. The MyGuide boot sequence draws a short high-current spike to initialise the display and GPS module. If the cell voltage is below roughly 3.5V at power-on, the protection circuit trips and the unit appears dead. Charge the new battery fully before attempting the first boot — connect to the OEM charger or a USB source and leave it until the charge indicator clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMyGuide 3500 reporting shorter battery life after a replacement swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell sometimes under-performs for the first few cycles because the electrodes have not yet reached full ion mobility. Run two or three full charge-to-discharge cycles with the GPS active before judging capacity. Also check that the device is not left in map-rendering mode with the backlight at maximum — the LCD backlight is the single largest current draw on this platform and cuts usable charge significantly. After the break-in cycles, battery life should stabilise at or near the 1300mAh rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415947640922,"sku":"BWCS-MIO168SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415947673690,"sku":"BWCS-MIO168SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415947706458,"sku":"BWCS-MIO168SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MIO168SL-1.webp?v=1779758396","url":"https:\/\/batteryweb.com\/products\/typhoon-myguide-3500-mobile-replacement-battery-37v-1300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}