Hi there, @NigelDeano-57. It's nice to see you around the Fitbit Community Forums. Thanks for bringing this to my attention. I'm sorry to hear that the battery of your Charge 5 is draining quickly. I understand your concern, I will do my best to help you with this!
As a first approach, I'd recommend making sure that your phone's software version is updated. For more information, refer to Check & update your Android version or Update your iPhone or iPad
Additionally, I'd suggest following the tips and recommendations provided here Tips to extend your Fitbit device's battery life.
On a side note, please bear in mind that as all rechargeable batteries age, they deteriorate to some extent and an older device will need to be charged more often than a new one. The best way of minimizing this effect is to avoid deep discharges of the battery. To maximize the overall life of your Fitbit device's battery, ideally keep it between 20-80%. Many people find that a daily battery boost works best ( e.g. giving it a 15 minutes charge while you are showering in the morning).
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