its a chase to to the bottom but you need to worry about stuff, those that dont will be gone, those that do will be affected by those that dont. ive seen a rise in digi air being the same as red gsm apparently
no i dont id always default so see no need
There isn't an ideal way.
Loading a battery and Volt testing will show accurately but doing that on a primary cell will affect it's life so all you can really do I Volt test. But I don't know that much about batteries in the level required