{"product_id":"huawei-fh88-replacement-battery-24v-700mah-ni-mh","title":"Huawei FH88 Replacement Battery HNBAAA6-21 2.4V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei FH88 \/ F688 Series — 2.4V Ni-MH Replacement Battery (HNBAAA6-21)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 700mAh Ni-MH replacement battery for the Huawei FH88, F688, and F688-20 cordless phone handsets. It replaces OEM part number HNBAAA6-21. The cell pack matches the original's footprint at 45.60 × 21.00 × 10.60mm, so it fits the handset battery compartment without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFH88, F688, and F688-20 compatibility:\u003c\/strong\u003e\n    These three handset models share the same battery bay dimensions, connector pinout, and 2.4V supply rail. All three accept this pack without adapter or wiring changes.\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 FH88 handset. The base station accepted the battery without charge errors, and the NiMH cells reached rated capacity after three conditioning cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for NiMH handsets:\u003c\/strong\u003e\n    After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells in cordless phones are shipped in a partially discharged state — a slow initial charge is what gets them to rated capacity. Skipping this step is the most common cause of short talk time complaints on new packs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange dropping on the FH88 after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FH88 DECT transmitter draws a short current spike each time it sends a radio burst to the base station. When a NiMH pack is low on charge or hasn't been fully conditioned, its internal resistance causes voltage to sag under that RF load. The handset's transmit power drops with the voltage, which shortens the effective range even if the handset appears to be on. Charge the pack fully — base station indicator solid green — before testing range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge light stays off after fitting new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH batteries lose voltage during long-term storage. If the pack voltage sits below approximately 2.0V when it arrives, some Huawei base stations won't begin the charge cycle — they read the pack as faulty rather than depleted. The fix is to seat the handset firmly, wait 10 minutes, then reseat it. This resets the base station's charge controller and it will usually pick up a low-voltage NiMH pack on the second attempt.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339876073562,"sku":"BWCS-HUF688CL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339876106330,"sku":"BWCS-HUF688CL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339876139098,"sku":"BWCS-HUF688CL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUF688CL-1.webp?v=1778366844","url":"https:\/\/batteryweb.com\/products\/huawei-fh88-replacement-battery-24v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}