{"product_id":"asus-p552w-replacement-battery-37v-1100mah-li-ion","title":"Asus P552w Replacement Battery SBP-18 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus P552w \/ P552v — 3.7V Li-ion Replacement Battery (SBP-18)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion cell sourced to the SBP-18 specification for the Asus P552w and P552v smartphones. It replaces an original cell that has degraded, swollen, or stopped holding a charge. Dimensions are 52.35 × 42.58 × 5.36mm — verify against your existing cell before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP552w and P552v compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay geometry, connector pinout, and SBP-18 part number. The voltage rail and BMS handshake are identical across the two, so one cell covers both variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through a P552w unit. The BMS accepted the cell without fault codes, charge current stepped down correctly at top-of-charge, and the protection circuit tripped cleanly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the P552w:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — it reduces erratic percentage readings in the first few days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the P552w after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe P552w fuel gauge IC builds its discharge model from the previous cell's coulomb-count history. After a swap, that model no longer matches the new cell's actual voltage curve. When the phone hits a load spike — modem transmission, screen wake — the cell voltage drops below the protection threshold faster than the IC expects, and the device cuts out even though the reported percentage looks safe. One full discharge-to-5% and uninterrupted charge cycle forces the IC to rewrite its reference curve against the new cell. After that cycle, shutdowns at falsely high percentages typically stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eP552w not powering on after the battery has sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells shipped or stored for extended periods can self-discharge below 2.5V per cell. At that level the BMS locks out to prevent damage, and the phone shows nothing — no boot screen, no charging indicator. Connect the phone to a wall charger and leave it untouched for 20–30 minutes before attempting to power on. The charge IC trickle-charges the cell back above the BMS re-enable threshold, typically around 2.9V, at which point the protection circuit releases and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409470947418,"sku":"BWCS-AP552SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409470980186,"sku":"BWCS-AP552SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409471012954,"sku":"BWCS-AP552SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AP552SL-1.webp?v=1779579783","url":"https:\/\/batteryweb.com\/products\/asus-p552w-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}