Honeywell Marathon Reference Manual page 126

6. Re-attach accessories, if any.
7. Turn the Marathon on.
The Marathon is ready for use.
Remove the extended battery from the Marathon when preparing to recharge the extended battery in a powered desktop dock
or in a Marathon multi-charger. Up to four extended batteries can be charged simultaneously in the battery multi-charger.
Honeywell recommends, when the Marathon will not have an extended battery attached, that the extended battery connector
cover be in place, protecting the Marathon extended battery connector opening.
5-2