Frequently Asked Question

Battery - How the battery works
Last Updated 2 years ago

First, in order to charge at all the iDSD micro must be at room temperature inside and out.

It will not charge below 10-15 degrees celsius and above 35-40 degrees celsius as charging LiPo batteries at temperatures outside this rage will damage them. Allow sufficient time for the iDSD Micro to warm up (if coming from cold) or cool down (after operation in Turbo) before attempting to charge. If the charge is not able to charge within 30 minutes, according to USB standard, it will "time out" and terminate the charge attempt until the device is unplugged and re-plugged (allow 30 sec for the charger to reset before re-plugging).

In case of battery where protection has kicked in, the charger will go into "bad battery" mode (this part of the USB Standard).

In this case the battery is charged with 100mA until it reaches 3.3V, with a timeout of appx. 30 minutes.

30 minutes is not sufficient to get the battery battery charged to the point where it has 3.3V and the battery protection circuit dis-engages.

Several rounds of unplug - replug the USB connection may be needed to get the battery reconditioned to normal (allow 30 seconds for the charger to reset before re-plugging)..

We have tested this before, the battery will eventually come back.

Past that some more on LiPo batteries & iFi:

  • Over-discharge / excessively low battery voltage - Battery is damaged and capacity reduced. If there is enough capacity reduction normal charging may turn to overcharging.
  • Over-charge / excessively high battery voltage - Battery is subject to "lithium depositing" and can become a fire risk. Overcharge can result from a cell having been excessively discharged previously.
  • Mechanical damage - If the battery is mechanically damaged (device containing it dropped or otherwise exposed to high level of shock) the damaged points will see lithium depositing which may lead to a fire risk (this spectacularly happened to a Tesla car where the owner damaged the battery when parking)
  • Lifespan issues - As long as the LiPo battery remains above 2.4V the main effect on battery capacity comes from the actual end of charge voltage. The safe end of charge voltage is 4.2V. Yet the longer the battery spends at 4.2V the lower the remaining capacity. So in this case it is not the charge cycle itself that impacts battery life but how long the battery spends at full charge.
  • All iFi batteries - Include battery protection circuitry that will protect the battery against over-charge, over-discharge and over-current (short-circuit).
  • Protection against mechanical damage (other then being inside a solid metal shell and having some cushioning) cannot be provided.
  • Example: The iDSD nano (and iCan nano) has a small battery, a simple 500mA charger with 100mA in case of a flat battery and the small battery will charge to normal condition in the 30 minutes time. It has no temperature protection and always charges to 4.2V. However, the iDSD micro has a battery with over 4 times the capacity of the nano's and will normally not recover from a battery with battery protection engaged in one charge cycle. In theory up to 5 charge cycles may be needed. It includes temperature protection and charges to 4.2V when the iDSD micro is turned off (100% charge for on the go use) and 4.05V when the iDSD micro is turned on (75% Charge for maximum battery life).

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