The Nickel Metal Hydride batteries used in Robop are state of the art for this technology as they deliver 13 Ampere Hours within a relatively small volume. However, they do not like to be over flattened. Should this happen they will simply never be able to hold a full charge. This would appear to be what has happened in your case. The possible causes might be your very low temperatures but is more likely to be because someone left the bird to go flat. One thing you may not be aware of is that Robop uses power constantly, even when switched off. This is because the microprocessor draws power to stay alive and keep its memory refreshed. While the current drain is very small, over a long period it does add up with the possible result that the battery becomes over flattened. If this problem persists you will have to send the bird back to us to have the battery pack replaced.
← The battery appears to need charging every two days when it used to last nearly two weeks what can be the problem?