UPS Kit for M1S (G231023511425)  with 18650 rechargeable Li-Ion battery holder

modul UPS (Uninterrupted Power Supply) je navrhnutá špeciálne pre ODROID-M1S. Je vybavená držiakom na nabíjateľnú Li-Ion batériu 18650, riadiacim integrovaným obvodom nabíjačky a 5Volt Boost DCDC. Na doske je malý MCU, ktorý meria úroveň nabitia batérie a komunikuje s doskou ODROID-M1S prostredníctvom rozhrania USB. Keď je zdroj  prúdu odpojený, UPS naďalej napája dosky ODROID-M1S pomocou batérie. M1S-UPS má sériový port USB (ttyACM), s ktorým komunikuje, takže môže spustiť proces vypnutia odoslaním varovania o slabej batérii. Výrazne sa tak zníži riziko straty údajov náhlou stratou napájania. Keď bude zdroj striedavého prúdu opäť k dispozícii, UPS bude opäť napájať ODROID-M1S a automaticky spustí udalosť zapnutia.

The battery is not included in the package, so you have to buy a PROTECTED 18650 Li-Ion rechargeable battery in your local market and install it.
The length of the 18650 Li-Ion battery with a built-in protection circuit is close to 68mm, which is about 3~4mm longer than the unprotected bare cell battery length of 65mm.

• Since the retail market in many countries, including South Korea, does not allow the sale of unprotected lithium-ion rechargeable batteries, we designed it to use batteries that include a protection circuit.
• For safety reasons, when purchasing batteries, please choose a reputable battery cell manufacturer if possible. As far as we know that Panasonic, LG, Samsung, and CATL are famous.

Due to the Li-Ion chemical characteristics, the battery voltage level might go higher slightly when the load is very light.

WIKI : https://wiki.odroid.com/accessory/power_supply_battery/m1s_ups