Some Flukes apparently have had issues with their screens dimming. In fact if you do a ebay search on it, you'll find repair kits available which claim to fix the problem. One thing I like about Flukes, is that the information they provide on their meters' specs are quite exhaustive. Tons of information on it's features, accuracy, ranges, resolutions, sample rates, blah, blah, blah. You're lucky if you get a fraction of that information from other companies.
I have not personally had the best luck with Craftsman meters, esp. their clamp meters. Owned a couple of them years ago and often found myself fighting with the machine to get it to go into the mode I wanted it to. Also had problems with dimming displays. That said, Sears has a sale going on one of their AC/DC clamp meters for a very good price which might be worth the risk. It's model DT362T (item # 03419741000) and is only $28 online, which is a practically unheard of price for a meter that can measure amps via it's clamp AND has RMS. Reviews aren't encouraging, but they aren't always the full story. If you purchase any Craftsman meter, esp. at nickle and dime-ing Sears, make sure you find out what the return policy is on it prior to opening the package up as they may try to hit you with a restocking fee (as they tried with me once).
By the way, most multi-meters aren't able to 'test' a car battery in the way I think you mean. Taking a simple voltage reading with one doesn't really give you much info regarding a batteries state of charge. It also can't give you information on what the actual capacity is compared to what's stated on the label (Amp/hour). In order to find that information out you would need something called a load tester or a conductance meter.
