{"product_id":"poly-calisto-5300-replacement-battery-37v-950mah-li-polymer","title":"Poly Calisto 5300 Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePoly Calisto 5300 — 3.7V Li-Polymer Replacement Battery (VDL952246)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 950mAh Li-Polymer battery replaces the VDL952246 cell inside the Poly Calisto 5300 portable Bluetooth speakerphone. It restores wireless calling and audio playback capability to units that no longer hold a charge. Capacity is rated at 3.52Wh and matches the original pack dimensions at 45.50 × 21.40 × 9.50mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCalisto 5300 fitment:\u003c\/strong\u003e\n    The 5300 runs a single Li-Polymer cell at 3.7V nominal to power both the Bluetooth radio and the class-D amplifier simultaneously. This replacement matches that voltage rail and physical footprint so the BMS handshake completes without an error state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through combined Bluetooth streaming and amplifier load. The BMS held the low-voltage cutoff correctly and did not trip on the transient current spike the amplifier pulls during loud audio passages.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    After fitting the new cell, run the Calisto 5300 down to the low-battery indicator, then charge it uninterrupted to full — this recalibrates the internal fuel gauge so the charge indicator reflects actual capacity rather than a residual reading from the old cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Calisto 5300 shows full charge but audio drops after about an hour\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA Li-Polymer cell kept constantly topped off at a desk never completes a full discharge cycle. Over time, the fuel gauge drifts and reports full when the actual usable capacity has shrunk significantly. The amplifier and Bluetooth radio together draw enough current that the true state of charge drops faster than the indicator shows. The speaker then hits the BMS cutoff unexpectedly, killing audio mid-session despite the indicator never reaching empty.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorting before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt high volume the class-D amplifier in the Calisto 5300 pulls a sharp current spike on every bass transient. When the cell is partially discharged, internal resistance rises and voltage sags under that spike. The amplifier clips because the supply rail dips below the threshold it needs to reproduce the signal cleanly. If distortion starts appearing with charge still showing, check the terminal voltage under load — a healthy cell should hold above 3.5V during playback.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416192974938,"sku":"BWCS-PRC530SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416193007706,"sku":"BWCS-PRC530SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416193040474,"sku":"BWCS-PRC530SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRC530SL-1.webp?v=1779760741","url":"https:\/\/batteryweb.com\/products\/poly-calisto-5300-replacement-battery-37v-950mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}