Wireless: T-LP1 / Tempest Belt Station Batteries Not Charging After Storage
Question: We have several Tempest wireless Belt Stationsthat have not been used in a year. Whenattempting to charge the T-LP1 Lithium Polymer Batteries in the charging station, the amber light continuouslyflashes and they will not take a charge. What should I do to get the batteries to charge back up?
Answer:First, try to charge the batteries in the belt station viathe wall charger. Let the units sit inthe off position for several days if necessary. Lithium based rechargeablebatteries do not like to be completely discharged. The safety circuits kick into keep the chemistry stable. Once they are fully discharged it may take sometime on the charger to get the batteries back to a state where they can chargenormally. Like all Lithium based rechargeable batteries, Tempestbatteries will slowly lose recoverable capacity while sitting on the shelf. Itis recommended that any Lithium based rechargeable battery be stored at 40-50%State of Charge (SoC) at something close to room temperature or below for bestresults. If stored at 50% SoC at 25°C (75°F) for one year, the estimatedrecoverable capacity is 96%. Cooler temperatures produce better results andwarmer temperatures produce lower recoverable capacity. If the same battery wasstored at 100% charge the estimated recoverable capacity is 80%.It is conceivable that a Tempest battery (or any otherLithium based rechargeable battery) stored at 100% SoC for one year at highertemperatures could lose a large amount of recoverable charge (50% or more).This would be an extreme condition set though, and not recommended. If storedproperly, Tempest batteries may be stored for a year or more with very littleif any negative impact to capacity or charging If you can’t find the original wall-wart that came with aTempest Belt Station then you can use a mini-USB charger but it will takelonger: You can use a mini USB (not the now more common microUSB) but there is a pin that needs to be shorted to get full current whichwon’t be on a generic charger. It should work though. It just might takelonger.
If after trying the above troubleshooting, and the batteries still will not charge, you may need to obtain new batteries by contacting your normal Clear-Com channel.
Answer:First, try to charge the batteries in the belt station viathe wall charger. Let the units sit inthe off position for several days if necessary. Lithium based rechargeablebatteries do not like to be completely discharged. The safety circuits kick into keep the chemistry stable. Once they are fully discharged it may take sometime on the charger to get the batteries back to a state where they can chargenormally. Like all Lithium based rechargeable batteries, Tempestbatteries will slowly lose recoverable capacity while sitting on the shelf. Itis recommended that any Lithium based rechargeable battery be stored at 40-50%State of Charge (SoC) at something close to room temperature or below for bestresults. If stored at 50% SoC at 25°C (75°F) for one year, the estimatedrecoverable capacity is 96%. Cooler temperatures produce better results andwarmer temperatures produce lower recoverable capacity. If the same battery wasstored at 100% charge the estimated recoverable capacity is 80%.It is conceivable that a Tempest battery (or any otherLithium based rechargeable battery) stored at 100% SoC for one year at highertemperatures could lose a large amount of recoverable charge (50% or more).This would be an extreme condition set though, and not recommended. If storedproperly, Tempest batteries may be stored for a year or more with very littleif any negative impact to capacity or charging If you can’t find the original wall-wart that came with aTempest Belt Station then you can use a mini-USB charger but it will takelonger: You can use a mini USB (not the now more common microUSB) but there is a pin that needs to be shorted to get full current whichwon’t be on a generic charger. It should work though. It just might takelonger.
If after trying the above troubleshooting, and the batteries still will not charge, you may need to obtain new batteries by contacting your normal Clear-Com channel.
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