My second-hand ThinkPad came with a charger that has no readable label, and the connection is getting loose. How can I work out the voltage and wattage for a replacement?
How do I find the right charger for my ThinkPad if the label is missing?
Asked by
v.91+teaclip
Answers
Look up the exact laptop model rather than trying to identify the old charger. It might not have been the correct one in the first place. The model number should help you find the manufacturer's charger specifications and a compatible replacement.
Reply to this answer
Check the underside of the laptop too. There may be an input rating printed there. For a fixed-voltage charger, match the required voltage and connector, and get one that can supply at least the required current.
Watts are volts multiplied by amps. A charger with a higher wattage capacity is generally fine when it has the correct voltage and is compatible with the laptop.
Reply to this answer
Don't assume any USB-C charger will work just because the laptop has a USB-C port. Some models don't charge through it. Check which charging connection your exact model supports and get a compatible charger with enough power.
Reply to this answer
Add your answer
Answers are reviewed before publication.
quietly_unlatched:
For example, 20 volts at 2.25 amps works out to 45 watts. Use the rating for the specific laptop, though, not that example.