Juniper Systems Allegro DOS Manual - Manual (Page 43)

Hardware Features Page 2-25
Try to charge the batteries within the recommended temperature range.
If you need to charge the batteries in temperatures exceeding this range,
you should purchase an extra battery and keep it charged for the most
efficient operation of the Allegro.
Power Connector
A dedicated standard external DC power input connector is located on
the top of the Allegro. The connector is 5.5 x 2.1 mm, 10 to 20 V DC. The
AC power adapter and optional cigarette lighter power adapter are
inserted into this connector.
< Power Connector
Charging Accessories for NiMH Battery Packs
❏ AC Power Adapter
Using the AC power adapter, the battery packis recharged without
removing it from the Allegro.
Please note that you must use the adapter included with the Allegro
or one that is capable of supplying adequate current (12 V at 1 Amp).
Otherwise, the battery pack could be damaged.
You can run the Allegro from the adapter while the batteries are being
charged. To charge the battery complete the following steps:
1) Plug the AC charging adapter into an AC outlet.
2) Insert the connector into the external power input jack located on
the top of the Allegro case. It can take up to five hours to fully
charge a battery pack.
3) When the batteries are fully charged, the charging circuit switches
into trickle charge mode. You can leave the Allegro connected to
the adapter continuously without overcharging or damaging the
batteries.
❏ Vehicle Power Adapter
With this adapter, you can charge battery packs via an automobile
cigarette lighter. To charge the battery, complete the following steps:
1) Plug the adapter into the cigarette lighter.