{"product_id":"tennovis-integral-d4-replacement-battery-37v-700mah-li-ion","title":"Tennovis Integral D4 Cordless Phone Replacement Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTennovis Integral D4 — 3.7V Li-ion Replacement Battery (5010808000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh lithium-ion battery replaces the original pack in the Integral D4 cordless DECT handset. It matches OEM part numbers 5010808000 and 5010808030. Capacity figures are taken directly from product data — 2.59Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIntegral D4 fit:\u003c\/strong\u003e\n    The D4 handset uses a compact Li-ion cell running at 3.7V nominal. Both OEM part numbers reference the same cell format — same footprint, same connector orientation, same BMS voltage acceptance window.\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 cutoff correctly at low-voltage threshold and accepted charge from a standard 3.7V Li-ion charge circuit without triggering protection mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Seat the handset in the base immediately after fitting this battery and leave it for a full charge cycle before first use. Li-ion cells shipped in storage-charge state need one complete charge to calibrate the handset's fuel gauge accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Integral D4 shows a charging error after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells in storage drop below 3.0V over time. Some DECT base stations read incoming voltage before starting a charge cycle — if the cell arrives below that acceptance threshold, the base flags an error instead of charging. This is not a fault with the battery or the base. Place the handset in the base and wait up to 20 minutes — most Integral base units will begin a trickle pre-charge once the cell voltage recovers slightly above threshold, then switch to normal charge automatically.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time noticeably shorter than the original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell does not always deliver full rated capacity on the first cycle. The handset's power management circuit estimates remaining charge based on voltage curves it learned from the old cell. After the first two or three full charge-and-use cycles, the circuit recalibrates. If talk time is still short after three full cycles, check that the handset is fully seated in the base during charging — a loose contact delivers incomplete charge and the cell never reaches 4.2V full charge voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339897700442,"sku":"BWCS-AYD420CL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339897733210,"sku":"BWCS-AYD420CL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339897765978,"sku":"BWCS-AYD420CL-3","price":29.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/batteryweb.com\/products\/tennovis-integral-d4-replacement-battery-37v-700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}