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Unprotected, flat top. Ships with factory cardboard boxes.
This is widely regarded as the best high drain 10440 battery in production today. Great for those little pocket rockets!
Manufacturer Cell Specifications:
These cells, like all lithium and IMR cells, should not be discharged below 2.5 volts.
You can read HKJ's excellent review of this cell here.
A few discharge curves of this cell from HKJ's comparator. Notice how it handles up to a 3A discharge and how it destroys the Ultrafire 10440.