Resin and Stamina Timer (Genshin, HSR, ZZZ, WuWa)

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zenless zone zero battery charge regeneration time backup battery

Zenless Zone Zero Battery Charge: regeneration and backup battery

Add Zenless Zone Zero, type the current Battery Charge and read when it reaches 240. Under Fine tuning, enter the backup battery to track what it accumulates.

An exact day from 0 to 240 and a reserve of 2,400

Battery Charge recovers 1 point every 6 minutes while below 240, which is 10 per hour and exactly 24 hours from 0 to 240. It is the roundest math of the four games: spending everything and coming back at the same time the next day finds the bar full. The item text in the game also states that the total Battery Charge limit is 1,000, including refills, but natural regeneration stops at 240.
When it reaches 240, Backup Battery takes over: 1 point every 18 minutes, up to 2,400, which can be converted into Battery Charge 1 to 1. Filling the whole reserve takes 30 days without spending anything. In hours, a day idle at the cap yields 80 points of reserve, against 240 you would have as Battery Charge had you spent earlier. Time spent on a full bar always costs two thirds of what normal regeneration would yield.
To plan, think in hours per run. A 20-point run equals 2 hours of regeneration, a 40-point one 4 hours and a 60-point one 6 hours. A natural day covers 12 runs of 20. The tool table works out the time the math closes for the number of runs you pick, and the alarm warns when it fills, with the tab open. The data was checked on 2026-10-18 in secondary sources, and Backup Battery appears in the in-game item text.

Time to 240 Battery Charge

Empty battery

Input: 0
Expected output: 24h 00m

240 points of 6 minutes.

Half

Input: 120
Expected output: 12h 00m

120 points missing.

One 60-point run away

Input: 180
Expected output: 6h 00m

60 points missing.

Two runs of 20

Input: 200
Expected output: 4h 00m

40 points missing.

Full reserve

Input: 2400 de reserva
Expected output: 30 dias

2,400 points of 18 minutes.

Full tool FAQ

How long until Genshin resin is full?

Original Resin recovers 1 point every 8 minutes and the cap has been 200 since version 4.7. From 0 to 200 is 26 hours and 40 minutes, and from 100 to 200 is 13 hours and 20 minutes. A full day returns 180 points.

How long does Honkai: Star Rail Trailblaze Power take to fill?

Does Zenless Zone Zero battery have a reserve?

What about Wuthering Waves Waveplates?

Do I need to keep the page open for the math to work?

Why did the notification not show up?

Can this tool's number differ from the game?

What happens if I refill with Fragile Resin, Fuel or Jade?

What time is the daily reset?

Are these caps the official ones today?

Frequently asked questions

Does ZZZ battery fill in 24 hours?

Yes, from 0 to 240, at 1 point every 6 minutes. One source disagrees and says 5 minutes per point, but most sources and the game text point to 6.

Does backup battery count as Battery Charge?

Only once converted. The game swaps Backup Battery for Battery Charge 1 to 1 when you ask, and the reserve alone does not let you play.

Can I go above 240 Battery Charge?

Yes, with refills and reserve conversion, up to the limit of 1,000. Above 240 natural regeneration stays paused, and the tool accepts values up to 1,000.

Next steps

An exact day from 0 to 240 and a reserve of 2,400

Battery Charge recovers 1 point every 6 minutes while below 240, which is 10 per hour and exactly 24 hours from 0 to 240. It is the roundest math of the four games: spending everything and coming back at the same time the next day finds the bar full. The item text in the game also states that the total Battery Charge limit is 1,000, including refills, but natural regeneration stops at 240.

When it reaches 240, Backup Battery takes over: 1 point every 18 minutes, up to 2,400, which can be converted into Battery Charge 1 to 1. Filling the whole reserve takes 30 days without spending anything. In hours, a day idle at the cap yields 80 points of reserve, against 240 you would have as Battery Charge had you spent earlier. Time spent on a full bar always costs two thirds of what normal regeneration would yield.

To plan, think in hours per run. A 20-point run equals 2 hours of regeneration, a 40-point one 4 hours and a 60-point one 6 hours. A natural day covers 12 runs of 20. The tool table works out the time the math closes for the number of runs you pick, and the alarm warns when it fills, with the tab open. The data was checked on 2026-10-18 in secondary sources, and Backup Battery appears in the in-game item text.

Time to 240 Battery Charge

Empty battery

Input: 0
Expected output: 24h 00m

240 points of 6 minutes.

Half

Input: 120
Expected output: 12h 00m

120 points missing.

One 60-point run away

Input: 180
Expected output: 6h 00m

60 points missing.

Two runs of 20

Input: 200
Expected output: 4h 00m

40 points missing.

Full reserve

Input: 2400 de reserva
Expected output: 30 dias

2,400 points of 18 minutes.

Full tool FAQ

How long until Genshin resin is full?

How long does Honkai: Star Rail Trailblaze Power take to fill?

Does Zenless Zone Zero battery have a reserve?

What about Wuthering Waves Waveplates?

Do I need to keep the page open for the math to work?

Why did the notification not show up?

Can this tool's number differ from the game?

What happens if I refill with Fragile Resin, Fuel or Jade?

What time is the daily reset?

Are these caps the official ones today?

Frequently asked questions

Does ZZZ battery fill in 24 hours?

Yes, from 0 to 240, at 1 point every 6 minutes. One source disagrees and says 5 minutes per point, but most sources and the game text point to 6.

Does backup battery count as Battery Charge?

Only once converted. The game swaps Backup Battery for Battery Charge 1 to 1 when you ask, and the reserve alone does not let you play.

Can I go above 240 Battery Charge?

Yes, with refills and reserve conversion, up to the limit of 1,000. Above 240 natural regeneration stays paused, and the tool accepts values up to 1,000.