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About the Concept:
This radio light has been discontinued by hand crank charging, making it easy to store in a maintenance free and portable disaster preparedness set.
(Why discontinued manual crank charging? ]
Reason 1: Since the battery quality retention date has been largely extended.
The original 1990s battery has a shelf life of about 3 years.
However, alkaline batteries have been extremely long for 5 to 10 years.
Therefore, if you keep these batteries together with those long term storage, we think that there is no inevitable feature of hand-crank charging.
Reason 2: Hand crank charging is tired.
Although we received the most voice during the East Japan earthquake, it was still a good idea that hand crank charging was tired.
In particular, since the battery capacity has become increased, it may take 10 to 15 minutes (*according to our research), when it is hand cranked to increase the battery capacity by 1% by 10 minutes (*according to our research).
However, if you store them with batteries that can be stored for a long time, you can charge them without having to turn them.
Reason #3: Maintenance free achievement
Many radio lights with hand-crank charges use rechargeable batteries on the internal power supply, so you need to charge them once or a half year to prevent them from overdischarge.
However, if you store them with batteries that can be stored for a long period of time, you can store them without maintenance.