{"product_id":"casio-v-t500-replacement-battery-37v-9500mah-li-polymer","title":"Casio V-T500 Replacement Battery HA-M20BAT 3.7V 9500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCasio V-T500 — 3.7V Li-Polymer Replacement Battery (HA-M20BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 9500mAh lithium-polymer replacement battery for the Casio V-T500 tablet. It carries OEM part number HA-M20BAT and fits the V-T500 directly. At 35.15Wh, it matches the original cell's energy spec and connects to the same BMS interface on the mainboard.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV-T500 platform fit:\u003c\/strong\u003e\n    The V-T500 uses a single-cell Li-Po architecture with a dedicated fuel gauge IC on the battery's protection circuit. The HA-M20BAT connector and BMS handshake are specific to this board — other Casio tablet batteries won't seat or communicate correctly here.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the V-T500's charge controller and confirmed the BMS accepted the cell, reported state-of-charge correctly after one full cycle, and held voltage above 3.5V under sustained display-plus-WiFi load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge IC reset after installation:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This forces the V-T500's fuel gauge IC to recalibrate against the new cell and clears the inaccurate percentage readings that almost always appear after a swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the V-T500 shuts down between 15–25% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe V-T500 uses a coulomb-counting fuel gauge IC that was calibrated to the old, degraded cell. When a new cell arrives, its voltage curve doesn't match the stored calibration data. Under combined load — backlight, WiFi radio, and active apps — the device pulls enough current to trigger a rapid voltage drop at the bottom of the charge curve. The BMS interprets this as a critical undervoltage event and shuts the tablet down even though charge remains. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets this calibration.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available on the V-T500 after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe V-T500's charge IC runs a handshake with the charger during the first accepted charge cycle. If the battery was replaced and the tablet hasn't completed a full charge yet, the system may default to trickle or standard charge rates as a precaution. This isn't a fault with the cell — it's the charge controller resetting its negotiation state. Plug into the original Casio charger or a USB-PD source rated at the correct voltage, let the first charge run to 100% without interruption, and fast charge availability will restore on subsequent cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425835319386,"sku":"BWCS-CVT500SL-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425835352154,"sku":"BWCS-CVT500SL-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425835384922,"sku":"BWCS-CVT500SL-3","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CVT500SL-1.webp?v=1779929903","url":"https:\/\/batteryweb.com\/products\/casio-v-t500-replacement-battery-37v-9500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}