{"product_id":"amx-mvp-8400-replacement-battery-74v-3600mah-li-polymer","title":"FG5965-20 AMX MVP-8400 Compatible Battery 7.4V 3600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAMX MVP-8400 Modero ViewPoint Touch Panel — 7.4V Li-Polymer Replacement Battery (FG5965-20)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 3600mAh lithium-polymer pack replaces the OEM FG5965-20 battery in the AMX MVP-8400 and MVP-8400i Modero ViewPoint touch panels. These panels are wall-mounted or handheld control interfaces used in professional AV installations to manage room systems, switching, and device control. Capacity is 3600mAh (26.64Wh) — matched to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMVP-8400 and MVP-8400i compatibility:\u003c\/strong\u003e\n    Both panels share the same battery bay geometry, connector pinout, and BMS handshake protocol. The MVP-8400i adds wireless communication hardware, which draws slightly more current during active RF transmission, but both units run on the same 7.4V cell configuration and accept this pack without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the MVP-8400 platform and confirmed the BMS negotiated correctly with the panel's charge management circuit. The protection board engaged at expected thresholds — no false low-battery flags during the test sessions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the MVP-8400:\u003c\/strong\u003e\n    After fitting this pack, run the panel through a full power cycle and allow the charge indicator to update across one complete charge-discharge pass. The MVP-8400 maps battery state against cell voltage during active use — skipping this step causes the fuel gauge to report incorrect percentages and trigger premature low-battery warnings during AV sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout on the MVP-8400 after the panel sat unused in a carry bag for months\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge during storage. If the MVP-8400 sits unused long enough, the cell voltage drops below the BMS's minimum recovery threshold — typically around 2.5V per cell. At that point, the protection circuit locks out charging entirely as a safety measure. Connecting the panel to its dock or USB charger will show no charging activity, and the screen may not power on at all. To recover, apply a slow pre-charge using a compatible Li-Po charger set to a recovery or trickle mode before reinserting the pack into the panel.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMVP-8400 display showing an unstable or jumping battery percentage after a new pack is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe panel's battery indicator is calibrated against the voltage curve of the original cell. A new pack with a fresh, full charge presents a slightly different resting voltage profile than a partially aged cell — the panel's state-of-charge logic hasn't mapped it yet. This causes the percentage display to jump or read inconsistently during the first few cycles. Run two full charge-discharge cycles through normal panel use and the voltage-to-percentage mapping will stabilise. After the second full cycle, the indicator should read consistently within the expected range at rest voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360731725914,"sku":"BWCS-AMX840SL-1","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360731758682,"sku":"BWCS-AMX840SL-2","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360731791450,"sku":"BWCS-AMX840SL-3","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMX840SL-1.webp?v=1778616209","url":"https:\/\/batteryweb.com\/products\/amx-mvp-8400-replacement-battery-74v-3600mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}