{"product_id":"tektite-charge-3b","title":"Tektite Charge 3B","description":"\u003cp\u003eThis tiny 100-gram charger can handle up to three batteries at 2 amps each, measure internal resistance, cycle, and more! Simply connect to a 100W USB-C source and you can charge batteries anywhere, without a huge mess of wires. Fits in your pocket, in your bag, and anywhere else you need it to be!\u003c\/p\u003e\n\u003cp\u003eDon’t ever try to figure out which battery is the most charged out of a series of red lights or pay over $100 to haul around a charger that feels like an actual brick again. The easy-to-use interface and color LCD display tell you voltage and other interesting numbers in real time!\u003c\/p\u003e\n\u003cp\u003eHave any questions? Join the Tektite Discord\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/discord.gg\/6uq7kxy6FZ\"\u003e\u003cstrong\u003ehere\u003c\/strong\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eand message in #charge-3b.\u003c\/p\u003e\n\u003cp\u003eDesign your own enclosure with the CAD\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/cad.onshape.com\/documents\/3a9b58e868bc58b4742132eb\/w\/b9776836363e03e5184b88a8\/e\/4a50d4a9045260adf5d23194?renderMode=0\u0026amp;uiState=694a51502dd2bd9618f24548\"\u003e\u003cstrong\u003ehere\u003c\/strong\u003e\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eTo use the battery cycling functionality, purchase WITH the resistor!\u003c\/strong\u003e\u003cbr\u003eYou can use any 4-ohm resistor with a 2-pin JST-PH MH-FC cable, but keep in mind that if you make your own it may get uncomfortably hot.\u003c\/p\u003e\n\u003cp\u003eNew features from Charge 2B:\u003cbr\u003e– 3.2″ color touchscreen\u003cbr\u003e– Fully enclosed design\u003cbr\u003e– Silicone feet that don’t come off (in normal use)\u003cbr\u003e– 3 batteries, up to 100W\u003cbr\u003e– Battery cycling (with external resistor)\u003cbr\u003e– Reverse polarity protection\u003cbr\u003e– Dynamic power limiting to support bricks down to 65W\u003cbr\u003e– High efficiency\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg decoding=\"async\" role=\"img\" class=\"emoji\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/17.0.2\/svg\/26a0.svg\" alt=\"⚠️\"\u003e \u003cstrong\u003eONLY USE WITH FIRST TECH CHALLENGE-LEGAL 12V BATTERIES!\u003c\/strong\u003e\u003cbr\u003eThis charger is not designed for any other types of batteries, and using it with these can cause catastrophic damage and danger.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003cbr\u003e\u003c\/strong\u003e– 65-100W USB-C charging brick\u003cbr\u003e– Batteries\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTutorial video:\u003c\/strong\u003e\u003cbr\u003e–\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/youtube.com\/shorts\/OwkvhhPU4VM\"\u003ehttps:\/\/youtube.com\/shorts\/OwkvhhPU4VM\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical specifications:\u003c\/strong\u003e\u003cbr\u003e– Termination: -7mV\/cell dV\u003cbr\u003e– Cycle: 4 charge (1.2A), 3 discharge (0.6A)\u003cbr\u003e– Mass: ~95g\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is internal resistance?\u003c\/strong\u003e\u003cbr\u003eWhen current is drawn from the battery (e.g. while driving around), the voltage will drop. This sag is because of internal resistance, which is a number that describes how much the voltage sags depending on current draw. If Charge 3B measures the battery’s internal resistance to be 150m, that means that it drops 150 milli-volts per amp drawn, so when drawing 20A your battery voltage will drop by 3V.\u003c\/p\u003e\n\u003cp\u003eFor the most accurate measurement of internal resistance, measure at 12V. You can do this by using the storage feature of Charge 3B to bring the battery to 12V, but note that this can take a while. Measurements taken when the battery is fully charged will report a higher internal resistance. Here are generally accepted meanings of internal resistance values:\u003c\/p\u003e\n\u003cp\u003e100-120m: Very good, typical for new batteries\u003cbr\u003e100-150m: Useful for competition\u003cbr\u003e150m-200m: Useful for practice and testing\u003cbr\u003e200m+: Dead, try cycling the battery or replace it\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is cycling?\u003c\/strong\u003e\u003cbr\u003eVoltage sag under high current draw can be caused by crystalline formations inside the battery chemistry, since those formations around the electrodes raise the internal resistance of the battery. If your batteries have been used heavily, this may be the cause of their poor internal resistance. By using the cycling feature, you can break up these crystals which can reduce the internal resistance of heavily used batteries, potentially making them useful longer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote that batteries can only do a finite number of cycles in their lifespan, so don’t cycle unless it’s absolutely needed!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCycling takes around 20 hours, so make sure you do not need to move the charger or battery before beginning the cycling process.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is storage?\u003c\/strong\u003e\u003cbr\u003eWhen batteries are stored fully charged (14+ V) or discharged (\u0026lt;11 V) it causes stress to the internal chemistry of the battery, reducing their lifespan and increasing their internal resistance. For long-term storage (6mo+) use the storage feature of Charge 3B to bring the voltage to 12V.\u003c\/p\u003e","brand":"Ferra Components","offers":[{"title":"Just the Charger","offer_id":51744196723008,"sku":null,"price":75.0,"currency_code":"USD","in_stock":true},{"title":"Just the Resistor","offer_id":51744198197568,"sku":null,"price":10.0,"currency_code":"USD","in_stock":true},{"title":"Charger and Resistor","offer_id":51744198230336,"sku":null,"price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0936\/8092\/7040\/files\/c3bscreen.jpg?v=1775333433","url":"https:\/\/ferracomponents.com\/products\/tektite-charge-3b","provider":"Ferra Components","version":"1.0","type":"link"}