True, learnt that the hard way. Spotted some nice replacements for my ups though - these lithium ones. These are the ones you typically need for most 1/2/3 KVA ups. Bought two of them for my 2kva ups for R849 each using the vouchers lol. Delivery will be next week and after testing these babies I will report back. These handle discharhing to 0% much kinder and they will give you more cycles than lead-acid / gel.Your batteries are not going to last long if you run them to 0%. UPSs are not meant to run things for a long period of time.
Also replacing a lead acid 7ah/8ah with some chinese replacement battery is going to cost you R250+ for a decent quality, so after repeating the process about 3 times you have paid same price as lithium ones in any case and the lithium should still outlast them.