All capsule light batteries are rechargeable li-ion batteries and have a lifespan of about 2-3 years (200-300 charge cycles). Li-ion batteries do 'age' over time, regardless of usage or charge frequency. 

Please note, factors such as temperature and storage condition can degrade the battery as well. 

If you find that your capsule battery is not holding a charge like it used to, please contact us for support and replacement instructions.