{"product_id":"samsung-yp-k5-replacement-battery-37v-600mah-li-polymer","title":"Samsung YP-K5 Replacement Battery 3.7V 600mAh 503040","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung YP-K5 \/ YP-K5J — 3.7V Li-Polymer Replacement Battery (503040)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 600mAh lithium-polymer replacement battery for the Samsung YP-K5 and YP-K5J portable media players. Part number 503040. It fits the compact form factor of both units and matches the original connector and cell dimensions (40.02 × 29.26 × 4.50mm).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eYP-K5 and YP-K5J compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and 3.7V power rail. The cell is a flat lithium-polymer pouch — not a cylindrical cell — so the physical fit and BMS voltage thresholds are identical across both variants.\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 a YP-K5 unit. The BMS accepted the cell without flagging a fault, and the device registered a full charge state at 4.2V. No protection-circuit tripping occurred during normal playback draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the YP-K5:\u003c\/strong\u003e\n    After fitting this cell, connect the player to a charger before attempting to power it on. If the replacement cell has sat in storage, its resting voltage may be low enough that the YP-K5 enters deep-discharge protection and refuses to boot. A slow trickle from the charger for 20–30 minutes resolves this before you apply full charge current.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping on the YP-K5 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe YP-K5 uses a voltage-threshold method to estimate battery level — it does not count charge cycles. After fitting a new cell, the player's indicator may jump between values or show a full bar then drop suddenly. This happens because the internal reference points were calibrated to the wear curve of the old cell. Run the player down to auto-shutoff, then charge it uninterrupted to 4.2V. One full cycle re-anchors the voltage thresholds and the indicator stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator shows empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe audio amplifier in the YP-K5 draws a brief current spike when driving headphone output at higher volumes. Near the end of discharge — typically below 3.5V — the cell can no longer sustain that spike without voltage sagging below the BMS cutoff threshold. The device shuts off even though the indicator still shows one bar. This is a cell-voltage floor issue, not a firmware fault. Keeping playback volume below 80% extends usable discharge depth on an aging or newly fitted cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381342470234,"sku":"BWCS-SMK5SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381342503002,"sku":"BWCS-SMK5SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381342535770,"sku":"BWCS-SMK5SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMK5SL-1.webp?v=1778900081","url":"https:\/\/batteryweb.com\/products\/samsung-yp-k5-replacement-battery-37v-600mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}