TAG Heuer F1 - Battery replacement cost?

[dolphins3]

Think my Tag F1 needs a replacement battery because the second hand is jumping in 4 second increments. Typically what sort of cost should it be to get the battery replaced and pressure tested?

I will be taking the watch into my local Goldsmiths (Oracle - Reading) for a quote tomorrow. Would prefere to get the battery replaced there and then rather than sending off for a 'service' at Tag.

Any advice welcome

DolphinS3

[dolphins3]

Watch is 3 years old. Got 3 quotes yesterday, all circa £50. And 4-6 weeks turnaround if sent away.