just encountered a problem with battery or alternator,not sure. on 1999 Volvo S70

help! my volvo just stalled and wouldnt start back up, i suspected a dead battery so i replaced it. drove about 3 miles and car started to lose power and stalled again. will a bad battery prevent car from running or should alternator handle this? oh yea, im showing the ets light is on. not sure if that has anything to do with it. please help!

Asked by for the 1999 Volvo S70
If the ETS light is on there's a good chance that is your problem. The ETS is the "Electronic Throttle System" and these are very problematic on this model, so much so that Volvo extended the warranty to 10 years and 200,000 miles.
You may have other issues too if the battery was dead, so either way you'll want to get this looked at by a Volvo shop.
Here are some near you: