UPS box  

I use a 3s2p battery. The case allows you to install a larger assembly to increase capacity and operating time.

In my assembly, 66 watts with a consumption of 5 watts is enough for 13 hours of operation, it takes 3 hours to fully charge the battery.

Assembling parts

1 Power Cable Wire Connector 5521
2 8/16pcs Type-C Female 2Pin Type-C Female Socket Connector Waterproof Jack Female Charging Port 3A USB-C Charger Plug Socket
3 AMASS XT60E-M Mountable XT60 Male Plug Connector 4.23g For Racing Models Multicopter Fixed Board DIY Spare Part

4 PD decoy module PD23.0 to DC DC trigger extension cable QC4 charger 12V

5 BMS 1S 2S 3S 4S 6S 7S Li-po Lithium 18650 Battery Capacity Indicator Power Bank Charge Meter Power Level LED Display

6 DC 12V 8A Dual-Sources Automatic Transfer Switches Controller Battery UPS Power Supply Module

7  1/3PCS 1S 2S 3S 4S 5V-26V 3A 40W Lithium Batery Charging Step-Down Module With Temperature Protection Current Adjustable

8  XL6009 DC-DC Booster module Power supply module output is adjustable Super LM2577 step-up module

9 screw for the lid М2\10