{"product_id":"tronsmart-bang-replacement-battery-74v-7800mah-li-ion","title":"Tronsmart Bang Replacement Battery 7.4V 7800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTronsmart Bang — 7.4V Li-ion Replacement Battery (INR18650-3S2P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 7800mAh Li-ion replacement battery for the Tronsmart Bang portable Bluetooth speaker. It slots into the Bang's battery bay to restore wireless operation when the original cell no longer holds a useful charge. Capacity is rated at 57.72Wh, matching the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTronsmart Bang compatibility:\u003c\/strong\u003e\n    The Bang runs a 3S2P 18650 cell arrangement to hit the 7.4V nominal rail the amplifier board and Bluetooth module share. Any replacement must match that cell configuration and voltage, otherwise the BMS rejects the pack at handshake.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the Bang's charge controller and monitored BMS communication at full amplifier load. The protection circuit handled current spikes during loud audio playback without tripping the overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle for the Bang:\u003c\/strong\u003e\n    The Bang is typically used at a desk or on a shelf and topped off constantly. Let the speaker drain below 20% at least once a month before recharging — continuous shallow cycling without a full discharge causes fuel gauge drift and accelerates cell capacity fade over time.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Bang's audio distorts before the battery indicator hits empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt high volume, the amplifier draws enough current to sag the cell voltage below what the amp needs to drive the speaker cleanly. This happens before the fuel gauge reads zero because the gauge tracks stored charge, not instantaneous voltage under load. The result is audible clipping or distortion while the indicator still shows one or two bars. Keeping the pack above 15% charge under heavy playback avoids the voltage floor where sag-induced distortion starts.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBang won't wake from USB-C after sitting discharged for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the Bang is stored without use for several weeks, the cell voltage can drop below the USB-C PD minimum acceptance threshold, and the charge controller won't initiate a charge cycle. The speaker appears completely dead — no LED, no response. Use a USB-A to USB-C cable from a standard 5V charger rather than a PD adapter; the lower-voltage trickle from a basic 5V source often coaxes a deeply discharged Li-ion pack back above the recovery threshold. Once the LED flickers on, switch to the normal charger and complete a full charge cycle before use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416179376218,"sku":"BWCS-TRB100SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416179408986,"sku":"BWCS-TRB100SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416179441754,"sku":"BWCS-TRB100SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRB100SL-1.webp?v=1779760669","url":"https:\/\/batteryweb.com\/products\/tronsmart-bang-replacement-battery-74v-7800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}