Direct compatibility answer
Is Samsung 45W 20,000mAh Battery Pack compatible with Samsung Galaxy S25 Ultra?
CompatibleUseful
Samsung lists a 45W portable battery for Galaxy S25-series phones; EB-P4520 supplies USB-C Power Delivery from a 20,000mAh pack.
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The phone negotiates its own supported charging rate; the pack's 45W rating is a maximum shared output. Safety qualification: exact tier-1/2 manufacturer or certification evidence is linked, with no active conflicting evidence.
Samsung 45W 20,000mAh Battery Pack
Samsung Galaxy S25 Ultra
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Evidence summary
What the online evidence establishes
Material limitation or blind spotThe phone negotiates its own supported charging rate; the pack's 45W rating is a maximum shared output.
Material limitation or blind spotSafety qualification: exact tier-1/2 manufacturer or certification evidence is linked, with no active conflicting evidence.
How we reviewed the online evidence
Online evidence checks
Important blind spots
No material blind spots are recorded for this verdict.
Online sources
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