18650, 21700, 26650 Li-ion batteries are widely used in dive lights. These Li-ion batteries are known for their high energy density, reliability, and long cycle life. There are some frequently asked questions about these batteries. Understanding how to properly use and maintain them can greatly enhance your diving experience.
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1. Is it a good idea to mix old and new batteries in your flashlights?
No. As batteries discharge, the internal resistance increases. This will limit current flow from the new battery since most devices require batteries in series. If you insert one new and one (50%) used battery into the device:
* Assuming the current drain remains the same, the old battery will run out after half the usual time. Unless you marked them or can measure them afterwards, you will have to throw out both batteries. Which means you have wasted half a perfectly good battery.
* If the device is sensitive to voltage (say a flashlight), the combination of new & old will start at 2.85V (e.g.1.5+1.35) instead of 3V. The torchlight may be less bright even at the beginning. That is, perform less well.
* Old batteries tend to degrade chemically faster than new batteries.
2. Can I leave Li-ion batteries on the charger?
With a properly designed charger, you should not have to take them off the charger when fully charged, the charger should disconnect and end the charging for you. Such as the XTAR chargers all can intelligently detect the fully charge and automatically stop charging. If you have a poorly designed charger, then yes it could damage the battery.
3. What decreases battery capacity the most?
The following decrease battery capacity dramatically:
* High charging/discharging rates.
* Charging the battery to 100%, discharging the battery to 0%.
* Storing battery at low or high state of charge(SoC) for long duration.
* Keeping device/battery plugged-in after charging has completed.
* Storing/operating batteries in extreme temperatures, low or high.
Welcome to check more details on our website:
Questions and Answers for Li-ion Batteries - XTAR
A list for questions: 1. Is it a good idea to mix old and new batteries to power your electronics? 2. Can I leave lithium ion batteries on the charger? 3.
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1. Is it a good idea to mix old and new batteries in your flashlights?
No. As batteries discharge, the internal resistance increases. This will limit current flow from the new battery since most devices require batteries in series. If you insert one new and one (50%) used battery into the device:
* Assuming the current drain remains the same, the old battery will run out after half the usual time. Unless you marked them or can measure them afterwards, you will have to throw out both batteries. Which means you have wasted half a perfectly good battery.
* If the device is sensitive to voltage (say a flashlight), the combination of new & old will start at 2.85V (e.g.1.5+1.35) instead of 3V. The torchlight may be less bright even at the beginning. That is, perform less well.
* Old batteries tend to degrade chemically faster than new batteries.
2. Can I leave Li-ion batteries on the charger?
With a properly designed charger, you should not have to take them off the charger when fully charged, the charger should disconnect and end the charging for you. Such as the XTAR chargers all can intelligently detect the fully charge and automatically stop charging. If you have a poorly designed charger, then yes it could damage the battery.
3. What decreases battery capacity the most?
The following decrease battery capacity dramatically:
* High charging/discharging rates.
* Charging the battery to 100%, discharging the battery to 0%.
* Storing battery at low or high state of charge(SoC) for long duration.
* Keeping device/battery plugged-in after charging has completed.
* Storing/operating batteries in extreme temperatures, low or high.
