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Sena 20s. Charging Amperage Sensitive

Brent Douglas

14 agosto 2015 18:32

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Hey guys,

Was wanting to ask if Sena 20s has the internal circuitry to limit the charging amperage to only accept the optimal number of amps without excess degradation of the battery. Reason I'm asking, I've been charging my Sena 20s using a USB 2.0 port on my computer which puts out 5v/0.5A. However, I was wanting to see if it's safe to charge the Sena 20s using a USB 3.0 port which outputs 5v and a maximum of 5A. I also have a portable battery bank that output 5V/1A and 5V/2A and was seeing if the Sena 20s can be charged safely using the portable battery bank without degrading the battery healthy performance.

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4 commenti

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  David Behr 14 agosto 2015 18:35

  Good question. Now, I'm sure the 20s doesn't have the ability to "limit" the amount of current it receives, but the question remains. If we charge with a 1 or 2 amp port will it harm the battery (in the long run). I doubt it would matter in the short run.

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  Brent Douglas 14 agosto 2015 18:41

  I know I was able to degrade my Bluetooth earbud's battery by charging them at 5V/1A instead of 5V/0.5A quite quickly; think 20 cycles or so. Granted the battery is as big as a watch battery. Since the battery can only be replaced with a totally new unit as well as the battery is sensitive to the number of charging cycles, wanting to make sure I take the best care possible in preserving this expensive tech.

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  Ken Kimari 18 agosto 2015 21:11

  The amperage only applies to what the charger can put out as it's maximum.  Any device plugged into it will only draw what it needs - the charger will not damage the charging circuitry of the device provided voltage is correct.  For example a device that takes .5 amps to charge correctly when plugged into a 5 amp charger will only draw .5 amps.  You can have a problem say for instance you have a .5 amp charger and a device that draws 1 amp to operate or charge.  The device will take a long time to charge and may never get fully charged in that case.  Many folks have that problem when trying to charge an iPad using an iPhone charger.  The iPad will not fully charge but if you charge your iPhone using an iPad charger then it's all good as the current draw is less than what the iPad charger is capable of putting out.  As far as the earbud failing it most likely has to do with a defective battery or charging circuitry in the device rather than the charger being the problem 

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  Brent Douglas 18 agosto 2015 21:16

  Thank you Ken for the in-depth response as well as including a possible explanation with why my earbuds went off the deep-end after charging them with a cellphone charger. I will go ahead and take away that the Sena 20s is safe to charge with my portable battery bank. Thanks again for taking the time. Much appreciated.