Good write-up @greenrun, you have succeeded in educating me. Presently I use an electric inverter because in my location I get at least 10hours of power supply daily, this inverter has worked successfully for about 2years (supplying power for at least 2days when fully charged) but only recently I discovered that it doesn't supply power for up to 20 hours. Will changing the battery bring back the good old days?
Thank you.
Yes, each battery has a certain number of times it can be charged and discharged before the backup time reduces.