The Li-SICO battery is designed for small current / long period application. It is not good to use a high
current, short period transmit method. The recommended minimum period for use of this battery is 5
minutes. If you use a shorter period time to transmit LoRa, then the battery life may be decreased.
5.3.2! Replace the battery
You can change the battery in the LLDS40.The type of battery is not limited as long as the output is
between 3v to 3.6v. !On the main board, there is a diode (D1) between the battery and the main circuit. If
you need to use a battery with less than 3.3v, please remove the D1 and shortcut the two pads of it so
there won't be voltage drop between battery and main board.
The default battery pack of LLDS40 includes a ER26500 plus super capacitor. If user can't find this pack
locally, they can find ER26500 or equivalence, which will also work in most case. The SPC can enlarge the
battery life for high frequency use (update period below 5 minutes)
LLDS40 supports AT Command set in the stock firmware. You can use a USB to TTL adapter to connect
to LLDS40 for using AT command, as below.
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