{"product_id":"explay-4game-replacement-battery-37v-2000mah-li-ion","title":"Explay 4GAME Compatible Battery 3.7V 2000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eExplay 4GAME — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2000mAh Li-ion replacement battery for the Explay 4GAME handheld gaming console. It fits the 4GAME directly and restores power when the original cell has degraded or stopped holding a charge. Capacity is rated at 7.4Wh, matching the stock specification for this device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eExplay 4GAME fitment:\u003c\/strong\u003e\n    The 4GAME uses a slim Li-ion cell measuring 70.05 × 59.95 × 4.31mm. The connector pinout and BMS communication line match what the 4GAME's charge IC expects — no adapter or modification needed.\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. The BMS held a stable cutoff voltage and the charge IC accepted the cell without triggering fault flags on the protection circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installation, disable fast charging if available and run one full discharge-to-charge cycle. This gives the fuel gauge IC time to map its coulomb counter against the new cell's discharge curve before any high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Explay 4GAME after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a fuel gauge calibration problem, not a faulty cell. The 4GAME's fuel gauge IC was trained on the original cell's voltage-discharge curve. A new cell has a slightly different curve, so the IC misjudges the remaining capacity and cuts power before the cell is actually empty. One full discharge cycle — run the device until it shuts off automatically, then charge to 100% without interruption — forces the coulomb counter to re-anchor to the new cell. After that cycle, shutdowns at 20–30% should stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eExplay 4GAME not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If this battery was stored for an extended period before installation, its resting voltage may have dropped below 2.5V per cell — the threshold where the BMS engages a lockout to prevent damage. The device will show no response: no boot screen, no charging indicator. Connect the 4GAME to a charger and leave it undisturbed for 20–40 minutes; the charge IC applies a low trickle current to bring the cell back above the BMS unlock threshold, typically around 3.0V, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404201853018,"sku":"BWCS-WKM001SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404201885786,"sku":"BWCS-WKM001SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404201918554,"sku":"BWCS-WKM001SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WKM001SL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/explay-4game-replacement-battery-37v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}