(b)(4).The device was received for investigation.Upon receipt the truled battery/led cartridge was visually examined for any signs of abus e/misuse/damage.None were noted other than normal wear and tear due to day to day activity.The battery/led cartridge was connected to a known good truled charging unit.The unit remained in the charging unit for well over 12 hours.The red charging light never changed to a green status.The complaint has been confirmed.The complaint has been confirmed.However, root cause cannot be determined.The warranty period is 18 months.Expiration date code for this unit is 1536.It should be mentioned the unit has passed the expiration date code by approximately 6 months.While the root cause for the charging failure cannot be definitively established, speculatively the charging circuitry could have been subjected to some form of trauma, or a circuit component could be faulty.No further action is required.
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