The Samsung Galaxy S21 Ultra launched as a near-flawless flagship. It boasted a stunning design and a powerful camera system. Yet it carried one perplexing flaw. Samsung had inexplicably limited its charging speed.

This decision baffled industry experts and consumers alike. It represented a significant step backwards for the Ultra line.
A Puzzling Step Backwards in Fast Charging
The Galaxy S21 Ultra’s maximum wired charging was capped at 25 watts. This was a clear downgrade from its predecessor. The previous Galaxy S20 Ultra had supported 45W charging.
There was no technical justification provided for this change. According to SamMobile, the limitation was a deliberate choice. It made the new phone less capable than the model it was replacing.
This move frustrated power users. Faster charging is a key feature for modern smartphones. The decision seemed to contradict the “Ultra” branding.
The Wider Impact of Samsung’s Charging Decision
This was not an isolated incident. The Galaxy Note 20 Ultra, released just months prior, suffered the same fate. It also lost the 45W charging found on the Note 10+.
The pattern suggested a possible cost-cutting measure across flagship lines. This theory was never officially confirmed by Samsung. The company remained silent on its reasoning.
The brand’s reputation for innovation took a small hit. Consumers expect progressive improvements with each new generation. A downgrade in any key specification is always poorly received.
The Galaxy S21 Ultra remains a curious chapter in Samsung’s history, defined as much by its 25W charging limitation as its many strengths. This puzzling choice continues to be a topic of discussion among tech enthusiasts years later.
Info at your fingertips
What was the Galaxy S21 Ultra’s maximum charging speed?
The Galaxy S21 Ultra was limited to 25W wired charging. This was slower than the 45W charging available on the previous S20 Ultra model.
Did any other Samsung phones have this issue?
Yes, the Galaxy Note 20 Ultra was also limited to 25W charging. Its predecessor, the Note 10+, also supported faster 45W speeds.
When did Samsung bring back faster charging?
Samsung reintroduced 45W charging with the Galaxy S22 Ultra. This restored the faster charging capability to the flagship Ultra line a year later.
How does this affect real-world charging time?
A 25W charger takes noticeably longer to fully power up a large battery. The difference can be 30 minutes or more compared to a 45W charger.
Why would Samsung make this change?
Samsung never officially explained the reason. Industry analysts often speculate it was a cost-saving measure, though this was never confirmed.
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