{"product_id":"tiny-battery-level-indicator-1s-lipo","title":"Tiny Battery Level Indicator – 1S LiPo \/ Li-ion (4-LED)","description":"\u003cp\u003e\u003cstrong\u003ePlease note: this is a very, very small component\u003c\/strong\u003e, about \u003cstrong\u003e9.5 × 5 mm\u003c\/strong\u003e, smaller than your fingernail. Check the fingertip photo for scale before you order.\u003c\/p\u003e\u003cp\u003eThat tiny size is the point. Connect it straight across a \u003cstrong\u003esingle-cell 3.7V LiPo or Li-ion battery\u003c\/strong\u003e and it shows how much charge is left on \u003cstrong\u003efour little LEDs\u003c\/strong\u003e (red, yellow, green, green). There's no microcontroller and no code — just two connections. It's small enough to peek through a buttonhole, sit behind a sheer panel, or tuck into the lining of a bag, so you know when it's time to recharge.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery type:\u003c\/strong\u003e 1S (single cell) 3.7V LiPo \/ Li-ion, 4.2V fully charged\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 4 LEDs — 25% \/ 50% \/ 75% \/ 100%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate thresholds:\u003c\/strong\u003e 25% 3.40–3.55V · 50% 3.55–3.70V · 75% 3.70–3.87V · 100% 3.87–4.20V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e about 9.5 × 5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 2 (+ and −)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo programming required\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePin Definitions\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e+\u003c\/strong\u003e — Battery positive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e−\u003c\/strong\u003e — Battery negative\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProject Ideas\u003c\/h2\u003e\u003cp\u003eA charge gauge on a light-up handbag, a hidden battery check inside a costume, a status window on a wearable enclosure, or a quick battery checker for your workbench.\u003c\/p\u003e\u003ch2\u003eGood to know\u003c\/h2\u003e\u003cp\u003eThe indicator draws a small current whenever it's connected. For long-term projects, add a small push button or switch so it only lights up when you check it. It's for single-cell (3.7V) batteries only: don't connect it to 2S packs, 5V USB or coin cells.\u003c\/p\u003e\u003ch2\u003ePair It With\u003c\/h2\u003e\u003cp\u003eUse it with our \u003ca href=\"\/products\/lithium-battery-charging-board\"\u003eLithium Battery Charging Board\u003c\/a\u003e to build a rechargeable power setup. Powering LEDs like the \u003ca href=\"\/products\/16-led-rgb-circuit-ring-ws2812b-black-pcb\"\u003e16-LED RGB ring\u003c\/a\u003e? This tells you when to top up. Use our \u003ca href=\"\/products\/mixed-sampler-soft-silicone-wire-24-awg\"\u003esoft silicone wire sampler\u003c\/a\u003e to route it somewhere visible.\u003c\/p\u003e\u003ch2\u003eIn the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1S battery level indicator × 1\u003c\/li\u003e\u003c\/ul\u003e","brand":"Tinker Tailor","offers":[{"title":"Default Title","offer_id":51926786474217,"sku":"TT-BATT-LEVEL-1S","price":2.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0790\/8006\/3209\/files\/S6bd794578c324953b5113bcf85f4fa2aW.webp?v=1790709541","url":"https:\/\/www.tinkertailor.ca\/products\/tiny-battery-level-indicator-1s-lipo","provider":"Tinker Tailor","version":"1.0","type":"link"}