{"product_id":"lithium-battery-charging-board","title":"Lithium Battery Charging Board","description":"\u003cp\u003eThe easiest way to add rechargeable power to your wearable projects — this \u003cstrong\u003eultra-compact USB-C lithium battery charging board\u003c\/strong\u003e is small enough to sew directly into a cuff, garment, or jewellery piece. No more disconnecting the battery to charge; just plug in a USB-C cable.\u003c\/p\u003e\n\n\u003cp\u003eI use these in almost all of my wearable builds. Smaller and more discreet than the traditional blue TP4056 boards, with a full protection circuit built in.\u003c\/p\u003e\n\n\u003ch3\u003eSpecs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInput: 5–6V (USB-C or wired)\u003c\/li\u003e\n\u003cli\u003eOutput: 3.7V single-cell lithium (parallel connection supported, no series)\u003c\/li\u003e\n\u003cli\u003eCharge current: 1A default\u003c\/li\u003e\n\u003cli\u003eAuto-termination when current drops to 100mA at float voltage\u003c\/li\u003e\n\u003cli\u003ePre-charge at 100mA when battery is below 2.9V\u003c\/li\u003e\n\u003cli\u003eOverdischarge protection: 2.4V\u003c\/li\u003e\n\u003cli\u003eOvercurrent protection: 4A\u003c\/li\u003e\n\u003cli\u003eOvervoltage protection: included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirst use:\u003c\/strong\u003e Connect power supply first to activate the protection board\u003c\/li\u003e\n\u003cli\u003eBattery connections must be soldered — use wire that isn't too thin\u003c\/li\u003e\n\u003cli\u003eDo not connect battery in reverse\u003c\/li\u003e\n\u003cli\u003eParallel connection only — no series\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNeed a battery to go with it? Try the \u003ca href=\"https:\/\/www.tinkertailor.ca\/products\/lithium-polymer-battery-110mah-high-performance-power-solution\"\u003eLithium Polymer Battery – 110mAh\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eUsing a QT Py? The \u003ca href=\"https:\/\/www.tinkertailor.ca\/products\/adafruit-lipoly-charger-bff-add-on-for-qt-py-1\"\u003eAdafruit LiPoly Charger BFF\u003c\/a\u003e is a plug-in alternative.\u003c\/li\u003e\n\u003cli\u003ePowering a mist maker? See the \u003ca href=\"https:\/\/www.tinkertailor.ca\/products\/mini-humidifier-driver-circuit-board-1\"\u003eMini Humidifier \u0026amp; Driver Circuit Board\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tinker Tailor","offers":[{"title":"Default Title","offer_id":50068059488489,"sku":"BATTERY-CHARGE","price":4.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/8006\/3209\/files\/991f8b68-Sa8aef63ebead4cdb8d7db5694672bf1ee.webp?v=1769271464","url":"https:\/\/www.tinkertailor.ca\/products\/lithium-battery-charging-board","provider":"Tinker Tailor","version":"1.0","type":"link"}