{"product_id":"blaupunkt-bluetooth-lautsprecher-replacement-battery-37v-2600mah-li-ion","title":"Blaupunkt BT202 Bluetooth Speaker Replacement Battery 3.7V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlaupunkt BT 202 Series — 3.7V Li-ion Replacement Battery (INR18650)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2600mAh Li-ion replacement cell for the Blaupunkt Bluetooth Lautsprecher range, including the BT 202 and BT 202 BK. It replaces the original INR18650 format cell when the pack no longer holds a useful charge. Fits the standard 18650 cell bay inside these portable wireless speakers.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBT 202 and BT 202 BK compatibility:\u003c\/strong\u003e\n    Both models share the same single-cell 18650 bay, 3.7V nominal rail, and the same protection circuit layout. Swapping cells between these variants does not require wiring changes — the connector and PCB footprint are identical across the series.\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 BT 202 hardware. The protection circuit responded correctly to overcharge cutoff and over-discharge cutoff at the expected thresholds, and the speaker's charge indicator tracked state-of-charge accurately throughout the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle on desk-use speakers:\u003c\/strong\u003e\n    If the speaker sits on a desk and gets topped off before dropping below 50%, fuel gauge drift builds quickly. Run the cell down below 20% at least once a month before recharging to keep the charge indicator calibrated and slow capacity fade on the Li-ion cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distortion before the battery indicator reaches empty on the BT 202\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAs the cell ages and internal resistance climbs, the amplifier stage pulls a current spike at high volume that the cell can no longer sustain cleanly. Voltage sags under that load even when the indicator still shows charge remaining. The amplifier clips under the sag, producing distortion before any low-battery warning fires. Replacing the cell restores the voltage floor — distortion should clear once the new cell holds steady above 3.5V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB charging not starting after the speaker sat unused for several months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA deeply discharged INR18650 cell can drop below the minimum acceptance voltage that USB-C PD and standard 5V USB chargers will negotiate against. The charger sees the cell as a fault condition and refuses to initiate a charge cycle. Some speakers have a trickle pre-charge mode that can recover the cell — connect to a USB port and leave it for 30–60 minutes without expecting the LED to respond immediately. If the cell reads below 2.5V on a multimeter, it has likely passed safe recovery threshold and replacement is the correct next step.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416194678874,"sku":"BWCS-BTK202SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416194711642,"sku":"BWCS-BTK202SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416194744410,"sku":"BWCS-BTK202SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BTK202SL-1.webp?v=1779760768","url":"https:\/\/batteryweb.com\/products\/blaupunkt-bluetooth-lautsprecher-replacement-battery-37v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}