Answer to: Battery will not chargeWe ran into an issue with defective battery on our 3120 stock and order from April 2015. Some 4,000 plus units had a defective LG battery. Dell acknowledge such and worked with us on a project to proactively replace the lot of defective batteries. It was not fun and had a lot of issues with power on the devices until the batteries were all replaced. The bad LG part number was - KTCCN.