mA current calculatorįor online collaboration to improve the Rechargeable battery charging time and mA current calculator | Convert to units and culinary measures., requests for new units or web tools additions, send your feedback. mA current calculator Respond to Rechargeable battery charging time vs. mA current calculator Rechargeable battery charging time vs. The link will appear on the page as: Rechargeable battery charging time vs. mA current calculator tool, copy then paste this code into your html. To link to this web based Rechargeable battery charging time vs. Hours equal to battery mAhr/10 ( mAh/10 = hrs )īattery charging time = capacity of the battery / charging current power output of the charger In total 6.2 hours ( 6 hours and 12 minutes ) is needed to charge or recharge 1800mAh batteries with charger that has 350mA current output power. It takes 21.6 hours ( 21 hours and 36 minutes ) to charge or recharge aa size 1800mAh batteries with charger that has 100mA current output. Here is a second example of how long to charge batteries but this time for charging 1800 mAh 1.2 volt NiMH aa type rechargeable batteries and with the same current chargers: It takes 8.2 hours ( 8 hours and 12 minutes ) time to charge or recharge 2400mAh batteries with charger that has 350mA current output. It requires 28.8 hours ( 28 hours and 48 minutes ) to charge or recharge aa size 2400mAh batteries with charger that has 100mA current output. Hours ( charging time ) equals to 12 x Ahr = hrs OR 12/1000 x mAh = hrsĮxample calculations with this manual formula calculate charging time length for 2400 mAh NiMH AA size 1.2v rechargeable batteries with 100 mA charger and secondly with a 3.5 times more powerful 350 mA current output power charger: How do I calculate charging time for rechargeable battery manually ?įormula for manual calculation for battery recharging processesĪAA – AA – C – D sizes rechargeable batteries: ampere – A ( electric charge amount measure ).milliampere – mA ( 1/1000 of ampere | 1 A = 1000 mA ).milliampere hour – milliamp hour – mAh – mAhr – mAhrs.nickel-cadmium battery ( cells ) – NiCd.The International acronyms one will possibly come across with while using batteries and their changers: Lets do the life/live charging examples, but before still in a short theory to clear some practical terminology out from the way.Ĭommon abbreviations – symbols – prefixes This is done with a very low charging current to keep the battery or batteries constantly alive, same like with a cordless phone battery pack that is docked in its station base. Trickle charge, continuous charging method This is still great to put up with considering that the 9 volts non rechargeable batteries cost arm and leg, but they don’t have to. Usually between 30 mA to 100 mA depending on the 9V battery capacity in mAh. Time control for charging of common 9V rechargeable batteries ( NiCd and NiMH 9 V batteries.) The timer takes longer because these can only be charged at much lower current rate of 0.1C or 1/10C ( mAhr/10 = charging time in hours ) of their mAh capacity value. Re-charging 9 volt rechargeable batteries You can select and use a specific / special battery sizes at the bottom of the field and then set a different current output from a battery charger, if needed, by choosing the 1mA current and multiplying the outcome backwards – dividing in fact by the existing current value at which your charging equipment operates. Without changing the hours/mA outcome multiple pieces for example 1-4 batteries can be charged. Type in a capacity number of one battery only. Then select the battery type/size in the left column ( NiMH – NiCd – AAA – AA – C – D – 9V ( 9 volt )) and in the right side select a current output ( electric power output ) of your charger in mA ( milli-amperes ). Type into the calculator your rechargeable battery’s capacity number, normally can be red on the battery body e.g. (Need more information? The charge formula is explained in details with examples further below.) Charging rechargeable batteries. “ hours” equal “ battery size in milliampere-hour” divided by “ charger output power in milliamperes“ How long time does it take to recharge a rechargeable battery?įormula for calculating batteries charging time : mA output for trickle charging methodīattery size, charging time length, charger current output type. specific size NiCd rechargeable batteries.specific size NiMH rechargeable batteries.NiCd size 9 Volt battery (30-100mA charge).NiMH size 9 Volt battery (30-100mA charge).* Precision in results is how many numbers after decimal point (0 – 9)Įnter a mAh number of your battery (ei: 2400 ) : mAh – * Enter a mAhr capacity value as shown on one battery only (to charge 1 to 4 batteries at once.) Step 1: Enter a mAh capacity of your Rechargeable Battery
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