Question about Motorola T5522 (7 Channels) 2-Way Radio

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MOTOROLA T5522 BATERIES

HOW LONG TIME NEEDS TO CHARGE THE BATTERIES OF T5522 WALKIE TALKIE? WE ARE ASKING THIS BECAUSE THE CHARGER HAS A RED LIGHT WHEN CHARGING AND DONT CHANGE THE COLOR OF THE LIGHT FOR EXAMPLE IN GREEN AND WE DONT KNOW WHEN THE BATTERIES ARE READY FOR USE.

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Hello mironas3,

A general rule of thumb when dealing with rechargeable battery packs is to take the capacity of the battery divided by the charge rating of the charger and then add an additional 10%.

Offhand I am not sure what the voltage / capacity or voltage / charge rating of the battery and charger are but you can determine that by examine the labels on both items. Let’s say (for example) that your battery is listed as 7.2 volts and 1,000 mAH and your charger is rated as 9 volts and 100 mA. (These are just theoretical examples. Substitute the numbers from your own items.) You would divide 1,000 mAH by 100 mA to equal 10 hours. Then add 10%. So you expect a full charge to take around 11 hours time.

Of course, actual charge time will vary depending on how discharged the batteries are when you start charging them. Since the charger that Motorola provided doesn't have a charge indicator determining when the batteries are done charging is a matter of making an educated guess. If you touch the batteries while they are charging and they feel warm to the touch, that's a pretty good indication that they are done or nearly done charging as once the batteries are topped off excess power will turn into heat. (Note that batteries in a charger should never be HOT. If they are ever more then just slightly warm, something is wrong with the battery or the charger or both.)

Also, just a word of warning here: remember to always use the correct manufacturer recommended charger. Substituting a charger with twice the charge rate to charge the batteries in half the time is not a good idea. Rechargeable batteries are meant to be charged slowly. Fast chargers exist but they typically have built-in circuitry that pulses the charge rate to prevent the batteries from overheating. Using the wrong charger can result in damage to your battery or radio or worse could possibly even lead to a fire.

Best Regards,
Ken
"Go Ahead. Use Us."

Posted on Jul 28, 2008

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