Rattling Battery?

[pilleya]

While I don't see there being a battery that is clearly better than others.

There are batteries which would be more suited to the abuse and the high current draw that FRC batteries typically face.

Some Battery manufactures supply intended use information with their batteries. I have found two different types of Panasonic Batteries online, both with similar capacity. The difference lies in their intended use. One battery use statement says "UPS, Security, Alarm, Instrument, Test Equipment, Medical Equipment;This model should be used for standby use only". Where as the other battery says "battery suitable for continuous cyclic usage such as golf buggies & mobility aids/motorised scooters."

Now, the difficult thing to consider is which of these fits FRC best. Typically batteries are charged and then not used for periods of time, then when it comes to events they are rapidly discharged and then recharged continuously. Would a battery intended for a UPS or a battery intended for something like a motorised scouter be superior?

Coming back to the actual intended thread topic, the Rattling Battery seems really strange. I would recommend recycling or disposing of it, it's just not worth the risk.