Suggestions And Precautions For Efficient Use Of Charger - Hitachi CL 10D2 Technical Data And Service Manual

7-2. Suggestions and Precautions for Efficient Use of Charger

Batteries may not be chargeable immediately after use:
If the type EB 1230H or EB 12B storage batteries are exposed to direct sunshine for an extended period, of if the
temperature of the batteries is 40˚C (104˚F) or higher immediately after they have been used in the tool, the pilot
lamp may not light up when the batteries are connected to the Model UC 14YF2 Charger. This is because the
built-in-thermostat functions to stop the charging when the temperature of the storage batteries reaches 40˚C
(104˚F) or more. In such a case, the customer should be advised to place the batteries in a shaded area with a
good airflow, and allow sufficient cooling before recharging.
This phenomenon is common to all existing batteries which employ temperature sensitive over-charge devices.
The cooling time required before charging can be accomplished varies from a few minutes to about 30 minutes,
depending on the load, duration of use, and ambient temperature.
--- 14 ---