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BHT-M70 Series
4 Maintenance
4.1 Storing the BHT
Store the BHT with a fully charged battery installed.
4.2 Handling the Batteries
4.2.1 Battery Life
Batteries are consumables. As the charging is repeated, the battery service life per charge declines.
If a battery as described below is used, replace the current battery with a new one: When the recharge
has been repeated to a battery more than 300 times, or when a battery has been used for more than
one year.
4.2.2 Battery Swell
The battery may swell depending on the condition as the expiry of its service life approaches. This is a
nature characteristic of a lithium-ion battery and is not safety hazard.
As the expiry of battery approaches, its service life declines and it may also be difficult to install or
remove a battery in/from the body of the terminal due to the swell of the battery.
Replacing the battery sooner is recommended.
4.3 Handling the SIM Card / microSD Card
This product incorporates connectors for SIM cards and microSD card. Do not insert anything other
than these cards. Do not insert a card inversely, diagonally and with twisted. Do not insert a card with
a pointed object such as a pen tip or a flat-blade screwdriver. If a card is inserted forcibly, this could
damage a card or a connector.
For procedures to install or remove a card, refer to 1.5 Installing and Removing SIM Card/microSD
Card.
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