![]() ![]() Or they may be given in milliamp hours and watts. Your battery capacity may be given in watt hours and your charge rate in amps. charge time = battery capacity (mAh) ÷ charge current (mA)Ĭharge time = battery capacity (Wh) ÷ charge rate (W)Īnd sometimes, your units are mismatched. So you may also see the formula written with different unit combinations. And your battery charger may tell you its power output in milliamps (mA) or watts (W) rather than amps. However, battery capacity can also be expressed in milliamp hours (mAh), watt hours (Wh) and kilowatt hours (kWh). So you'll often see this formula written with these units: charge time = battery capacity (Ah) ÷ charge current (A) ![]() Most often, your battery's capacity will be given in amp hours (Ah), and your charger's charge current will be given in amps (A). The easiest but least accurate way to estimate charge time is to divide battery capacity by charge current. Formula 1įormula: charge time = battery capacity ÷ charge current I start with the simplest and least accurate formula and end with the most complex but most accurate. 3 Battery Charging Time Calculation Formulasįor those interested in the underlying math, here are 3 formulas to for calculating battery charging time. Click "Calculate Charge Time" to get your results. If your battery is dead, you'd enter 0.Ħ. For instance, if your battery is 20% charged, you'd enter the number 20. Optional: Enter your battery state of charge as a percentage. Select your battery type from the list.ĥ. Depending on the combination of units you selected for your battery capacity and charge current, the calculator may ask you to input a voltage.Ĥ. If the calculator asks for it, enter your battery voltage or charge voltage. The unit options are milliamps (mA), amps (A), and watts (W).ģ. Enter your battery charger's charge current and select its units from the list. The unit options are milliamp hours (mAh), amp hours (Ah), watt hours (Wh), and kilowatt hours (kWh).Ģ. Enter your battery capacity and select its units from the list. Do not leave the battery and charger unattended while charging.Tip: If you’re solar charging your battery, you can estimate its charge time much more accurately with our solar battery charge time calculator. Do not charge the battery on a surface that is flammable or can be damaged by heat. It is normal for the battery to get warm during the charging process. STEP 5: Install battery into your vehicle, only when you are ready to make a run with the CRUSHER. STEP 4: Unplug the battery from the charger and remove the charger from the wall plug. Battery should be unplugged from the charger after a maximum 8 hours. STEP 3: When the LED indicator light on the charger turns back to green, the battery is fully charged.Ĭharge times are (3-3.5 hrs.) do not leave on charge overnight. STEP 2: Connect the 7.2 Volt battery to the charger. When plugged in a green LED light will come on. STEP 1: Remove the wall plug charger from the package and plug it into the wall. Please read the following information before using your new LiteHawk. ![]() Your New LiteHawk comes with a rechargeable 7.2 Volt NimH battery. Lithium systems cannot run with NimH Batteries and Lithium Chargers cannot Safely Charge NimH batteries. NimH systems cannot run with Lithium Batteries, and NimH Chargers cannot Safely Charge Lithium Batterys. Never Mix NimH Battery Packs and NimH Battery Chargers with Li-ion Battery Packs and Li-ion Chargers. Only to be used with NIMH Wall Charger 285-428071įor LiteHawk CRUSHER MT, SCOUT Battery Charge.
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