In order to test how unfamiliar some of the featured battery brands are among the general public, The Gobmeister began showing the photos from rounds One & Two to some of his work colleagues and patients. The average familiarity score was about 15%. One patient - a trainee marketing consultant - was so taken with the concept, that he promised to keep a look out for rarities. Here's what he encountered in Malta (he got his Mum to bring it in when she came for her eye test):

Note the commonly used "Duracell"-like livery, but with the name tipping a nod towards the "Eveready" camp. Thank you Mr.J.Hendry!
Unfortunately this next one, due to a touch of amnesia on The Gobmeister's part, must remain uncredited for the time being (possibly from Johnny 5).

A variation on the "Duracell"-like livery, the TEAP has the copper coloured section at the negative terminal end, and the elongated teardrop flash is obviously hinting at the built-in charge-checker found on many genuine Duracells! (Although the TEAP battery has no such facility).
The only comment needed for this next photo is that with batteries, as in life, you get what you pay for.

I think the two tailors from "The Fast Show" would be avid advocates of this next brand:

Suits me! (Actually feels like quite a decent quality battery).
Hopefully this next one will brighten up your day:

Finally, for the time being, The Gobmeister will leave you with this variation on a previously featured brand, "Airdeer" (or is it "Pairdeer"?) from those industrious fellows at the Zhongyin (Ningbo) Battery Co., Ltd..

Nice!