Jolly logic AltimeterOne User Manual page 5

Recharging
Your altimeter has an advanced Lithium Polymer battery, the same
type of battery used in the latest laptops and cell phones (only
much, much smaller).
It can be recharged in any standard USB port, including those on
computers, printers, and other devices.
Recharging Directions
Insert the altimeter into a USB port
The back will glow red or green near the plug
if inserted properly
If unit does not glow when inserted:
a. Make sure computer is turned on
b. Flip the altimeter over and try again
Red glow
Green glow
Fully charging the altimeter usually takes about two hours if the
battery is completely discharged. It does not hurt the battery to
leave it in the charger, and it's fine to "top it off " whenever you
can.
The battery holds enough charge to power the altimeter for at
least 14 hours of continuous use.
Glow area
is on the back
indicates that altimeter is charging
indicates that charging is 100% complete
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