I drove it for a couple of hours and the battery still didn't charge. When I asked my wife about it shenoted the same problem for the past several days but thought it was b/c she wasn't as skilled in driving a hybrid. Usually, she can keep the battery charged very high and I can almost always charge it fully in 20 minutes or less. It hasn't stranded me yet but I find it kind of strange. Perhaps something with the regen?