DC 9V Mini UPS Tecnical Features : 

    Mini UPS uninterruptible power supply is a standby energy storage power supply. Used safe and environmental lithium cells, credible and stable PCB, trickle/constant-current/ constant-voltage lithium battery charging BMS.

    Created by high performance and efficiency DC-DC, boosting and switching circuit. This mini UPS with perfect over-charged, over-discharged, over-current and short-circuit protection. 

Q:What"s the type of ups?
A:It"s a mini on-line ups.

Q:How is it work?
A:When have electricity,ups act as a bridge, city power provide electric to device,at the same time,ups is being charging.When no electricity,then ups back up the device.

Q:How to charge the UPS?
A:Battery will only charge with power switch in the ON position.

Q:What"s the backup time?How can i decide which model is suitable to my device?
A:Different capacity will have different backup time,with following information,we can choose the most suitable ups to you :
1.What"s the device you plan to use?
2.What"s the working voltage and current?
3.What"s your expected backup time?

Q:How can I maintain the device lifetime?
A:When stored, the ups will self-discharge at a rate that is greatly affected by the ambient temperature. It should therefore be fully charged before being put into storage and if it is to be stored for a long period, it should be recharged periodically to prevent it from losing its original capacity. 
As a guide, the ups should not be stored for longer than the periods shown below without being recharged:

6 months at 20°C
3 months at 30°C
2 months at 35°C
If the ups was not used for long time, it is suggested to charge it once every 3~5months

Q:Do you have any other models?

A:Yes,we have variety models with defferent capacities,please contact with me for more details.