4 and 5 Star reviews
Is the review rating not good ?
***** Update 4/30/2012  -  Apparently the 3/25 problem with charge and retention was related to the original "too short" flaw.  Seeing the tape I used to build up the end had compressed a lot under the camera battery's retention clip, I improved that fix and the charge and retention are back.  After a thousand flash-less test pictures there is power left in the charge from a few weeks ago.  Still One Star for the size flaw, tho ********** Update 3/25/2012  -  Seems to Run Out of Juice Awful Quick. . .Now I question this Brand's Total Charge and/or Retention. I've had better all-round luck with Power2000 *****I bought this extra battery for my Olympus Stylus with high hopes since a different battery from a different "No Name" brand works well in my Canon camera.  On arrival the battery looked just like the Olympus original but when I put it in the camera nothing happened.Since rechargable batteries usually arrive with enough charge to at least turn on the equipment, I wondered if the thing was DOA.  I tried charging the battery several times in the camera without success in any way.  Again I figured DOA.For some reason I eventually tried pressing the battery down lightly inside the battery compartment with my finger and turning the camera on.  ...It worked...  And it worked fine every time I tried it.When installed, the battery is a "hair" too short to touch the contacts inside the battery compartment.  The original Olympus battery has NO HINT of this problem.  I roughly compared the Olympus and Maximal batteries side by side.  If there is any difference in length it is very small but apparently enough to cause an issue.I imagine the problems with the battery having no power seen here in a few negative reviews could be from a lesser degree of the same issue, where the power connection is flawed during use or charging so one suspects the thing is no good.The work-around is to build up the end of the battery with tape or something, though such a fix could make switching batteries a real pain given the tight clearances in the battery compartment.I decided to exchange the battery and hope the replacement meets the original spec. better.  I'm encouraged by it's vast majority of 4 and 5 Star reviews.  The battery was provided by Amazon and I managed to discover the problem within Amazon's Return Window so at least the return is going smoothly, supposedly with no extra cost to me for shipping the battery back and receiving it's replacement.The replacement arrived and has the same problem.  Using several layers of scotch tape, I built up the battery end where the tiny clip holds it in the camera.  The battery seems to work fine now while still slipping in and out of the camera easily.The package has a Support number to call.  The person I spoke with didn't know of any problems like mine and recommended I return the battery to Amazon AGAIN and ...get this... TRY AN DIFFERENT BRAND.  AND though it also is marketed for other manufacturer's cameras, this replacement is SUPPOSED to be an EXACT match for the Olympus model my camera takes...It even has the same Model Code on the package (LI42B).Subsequently I was looking at replacements for a Canon NB-6L battery and saw many 1 Star ratings for MaximalPower's NB-6L battery noting that the thing was TOO BIG to fit, although otherwise that battery also has a high rating. 