Dell M3800 battery failures

My office has been getting a few M3800's over the last year. We have maybe 5 or 6 so far. The batteries keep failing on about half. 1 of the units had a motherboard unit fail on it twice (including replacement). Another had a motherboard failure, and 3 have had complete battery failures. Since they're under warranty, dell has been quick to fix but it seems like bandaids on an open wound.

Anyone else experiencing similar issues? Reliability is so bad that our IT dept doesn't want to buy...

Dell M3800 battery failures