{"product_id":"palm-m500-replacement-battery-37v-850mah-li-polymer","title":"Palm M500 PDA Compatible Battery IA1TB12B1 3.7V 850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePalm M500 \/ M505 \/ M515 — 3.7V Li-Polymer Replacement Battery (IA1TB12B1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 850mAh Li-Polymer battery for the Palm M500, M505, and M515 personal digital assistants. It replaces OEM part IA1TB12B1 and fits the slim battery bay shared across the M500 series. Dimensions are 62.80 × 35.22 × 4.00mm — measure your original before ordering if you are unsure which Palm PDA you have.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM500, M505, and M515 compatibility:\u003c\/strong\u003e\n    All three models use the same battery footprint, connector pinout, and 3.7V supply rail. The M505 and M515 add a colour screen but draw from the same cell. One battery part number covers the full trio.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through charge and discharge cycles on an M505 unit. The BMS engaged correctly at low-voltage cutoff, and the device recognised the battery without calibration prompts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSync before you swap:\u003c\/strong\u003e\n    Palm PDAs hold open application data and the RAM file system on main battery power. Pull the battery with unsaved data open and that data is gone. Do a full HotSync to your host computer before removing the old cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M500 loses saved data after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Palm M500 series uses SRAM for active storage. SRAM is volatile — it needs continuous power to retain anything written to it. The moment the battery is removed and no backup cell is present, RAM contents are wiped. This is not a firmware bug or a faulty battery; it is a function of the hardware architecture. Sync everything to the desktop before the swap, then reinstall your applications after the new battery is seated and charged.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePalm M500 shows low battery immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at a storage charge — typically around 3.6V — not a full 4.2V. The Palm OS reads raw cell voltage and flags anything below its threshold as low. The device is not faulty and neither is the battery. Charge the unit fully before first use and let the voltage gauge recalibrate across one complete charge cycle. After a full charge to 4.2V, the low-battery warning clears and the indicator reads correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415957110874,"sku":"BWCS-PM500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415957143642,"sku":"BWCS-PM500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415957176410,"sku":"BWCS-PM500SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PM500SL-1.webp?v=1779758425","url":"https:\/\/batteryweb.com\/products\/palm-m500-replacement-battery-37v-850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}