I have an Exide in my 280SE.

The battery I took out of the Jeep was NOT built to the same specs, if it was an Exide...

My 4.5's Exide is sealed, maintenance-free, and has been one hell of a great battery for about 4 years now. The one that was in the Jeep was not sealed, didn't even have a carrying handle/strap, and had a much MUCH thinner case wall (to the point where you could feel it cave in when lifting - and it also was bulged out even when new).

If Exide batteries have gone downhill since my purchase, I'll never buy another one. I keep hearing everyone say that they're crap, even though the one in my 4.5 is a great battery. I'll get an Optima from now on, then.