User Guide

General Information 4
that you do not leave the fully charged battery connected to a charger. If left unused, a fully
charged battery will lose its charge over time.
Ensure to follow the following precautions related to battery usage:
1. Do not disassemble or open crush, bend or deform, puncture or shred.
2. Do not modify or remanufacture, attempt to insert foreign objects into the battery,
immerse or expose to water or other liquids, expose to fire, explosion or other hazard.
3. Only use the battery with a charging system that has been qualified with the system per
this standard. Use of an unqualified battery or charger may present a risk of fire,
explosion, leakage, or other hazard.
4. Do not short circuit a battery or allow metallic conductive objects to contact battery
terminals.
5. Replace the battery only with another battery that has been qualified with the system per
this standard, IEEE-Std-1725-200x. Use of an unqualified battery may present a risk of
fire, explosion, leakage or other hazard.
6. Promptly dispose of used batteries in accordance with local regulations.
7. Battery usage by children should be supervised.
8. Avoid dropping the phone or battery. If the phone or battery is dropped, especially on a
hard surface, and the user suspects damage, take it to a service center for inspection.
9. Improper battery use may result in a fire, explosion or other hazard.
10. For those host devices that utilize a USB port as a charging source, the host device's
user manual shall include a statement that the phone shall only be connected to CTIA
certified adapters, products that bear the USB-IF logo or have completed the USB-IF
compliance program.
Battery Replacement
When the talk and standby times are noticeably shorter than normal, replace the battery with an
original Sonim battery. If a replacement battery is being used for the first time or if the battery
has not been used for a prolonged period, it may be necessary to connect the charger and then
disconnect and reconnect it to begin charging the battery.
Avoid Short Circuit
Do not short-circuit the battery. An accidental short-circuit can occur when a metallic object such
as a coin, clip, or pen causes direct connection of the positive (+) and negative (-) terminals of
the battery. (These look like metal strips on the battery.) This might happen, for example, when
you carry a spare battery in your pocket or purse. A short-circuit at the terminals may damage
the battery or the connecting object.