Here is my Ericsson T28s in the rare “Slate Blue” color! It still runs on its original High Capacity BHC-10 battery, and can stay on up to a week in standby mode! :
Sony Ericsson T28 Battery - EMT Company – emtcompany.com
Sony Ericsson T28S Battery Replacement | New
Sony Ericsson T28S Battery - EMT Company – emtcompany.com
Portable Emergency AA Battery Charger Extender suitable for the Sony Ericsson T28 WORLD - with Gomadic Brand TipExchange Technology - Walmart.com
Sony Ericsson T28 Battery Replacement
Ericsson T28 my favourite 1999 phone : r/vintagemobilephones