Changing the battery on the magnetic stainless steel watch

The battery: Renata 371 - SR920SW 1.55V Silver Oxide Watch Battery
The watch: Eoeo DAYNATO - magnetic stainless steel watch
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The battery:
Renata 371 - SR920SW 1.55V Silver Oxide Watch Battery
Trust your timepiece to the Swiss battery brand that began in the watch industry and has over 50 years of experience powering them.
Renata was founded in Switzerland in 1952 to produce mechanical parts for wrist-watches. By the 1970s, its focus shifted to the research and development of high quality silver-oxide cells to power them.
Renata is experienced in the end-to-end battery production process. Its modern, highly automated, production plant incorporates an extensive quality testing system.
In addition to watch batteries, Renata manufactures lithium cells for consumer electronics. Research, development, production, and quality testing are grouped at Itingen, Switzerland headquarters. Renata is ISO 9001 and ISO 14001 certified by Bureau Veritas (Switzerland, updated Dec. 2020).
• 100% mercury-free.
• Dedicated high and low drain for optimal performance.
• Sophisticated leak-proof sealing technology and high-capacity retention.
• Fully transparent freshness dating.
• Convenient peel-off flap for easy removal of batteries.
• Pre-perforated packaging to easily separate blister packs.
About this item
• Renata Silver Oxide Battery - Superior Leakage Resistance
• 371 SR920SW | Nominal Voltage - 1.55V | Nominal Capacity - 35 mAh
• High capacity retention on storage (low self-discharge)
• Swiss quality and consistently great performance, battery after battery.
• Works for toys, watches, cameras, calculators, car security alarm, keyless car remotes, organizers, computer equipment (memory backup battery) CMOS
Technical Data Sheet
Specifications:
Chemical system: Zinc / Monovalent Silver Oxide, Low Drain
Nominal Voltage: 1,55 V
Capacity: 35 mAh, Discharge over 25,5 kΩ at 20°C to 0,9 V
Operating Temperature: -10°C - 60°C
Self Discharge: Less than 5% per year at 20°C
Weight: ~0,55 g
Dimensions:
(according to IEC 60086-3)
Diameter: 9,50 mm (0,374“)
Height: 2,05 mm (0,081“)
Discharge Curve:
Constant Load: 25,5 kΩ
Starting Drain: 61.6 μA
Temperature: 20°C
Site: www.renata.com...
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The watch:
Eoeo DAYNATO - magnetic stainless steel watch
Daynato-Mag Stainless Steel Luxury Watch Male Diving Watches Military Swiss Quartz Wristwatch New Technology Waterproof Gift Mens 2021
Product Description:
Brand: EOEO
Series name：DAYNATO
SKU: DTSR010/ DTSR020
Style: Street Trends&Military
Shape: Round
Quality: New
Popular Element: Magnetic Design
Movement: Quartz
Mirror material: No mirror design
Expanded function：Counting time
Crown: Screw-in chronograph crown
Colour scheme: Silver Gray
Dial thickness: 12.5mm
Dial diameter: 42mm
Case material: 316L Steel
Strap material: Stainless steel/Nylon
Time to market: 2020
Display method: Magnetic Ball Type
Waterproof: 5 ATM/5 bar
Battery life: 2 years
Reading mode: See/Touch
Time display: Outer Hour, Inner Minutes
Magnetic principle: Magnetically controlled ball operation
Site: eoeowatches.co...
*disclaimer:
What does 5 ATM mean?
5 ATM means that a watch can withstand a pressure of 5 bar or a water column of 50 meters. In practice, this corresponds to the pressure of a flowing water jet when washing hands, showering or bathing. 5 ATM does not mean that a watch is waterproof to a depth of 50 meters, but that it can withstand the pressure of a water column of 50 meters. Because when swimming, the swimming movements can cause pressure peaks that are much higher than 5 bar. Due to these pressure peaks, only watches with the designation 10 ATM or higher are suitable for swimming.

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Or you could do it properly with the proper tools of course.