pcmhacking.net

is if possible to add an external battery to the NVRAM? kinda like a BIOS battery on a PC motherboard.

This is not the right thread for these questions, this is about ebay clone hardware. But your answer is no, the internal battery is a non-user replaceable part. However, the genuine unit will last its 10 years. If you wish to attempt to build one of your own with replaceable battery try and find festys thread on the subject, and/or start a new thread.

I was a sucker and bought an ebay special, 1 chip crapped, got another and same, i am now using the real thing.
I didn't know any better but will send some trade your ways I am sure in the future.

I have only just started the tune process of my modded VR 5litre

Looks like a quality job there
That NVRAM chip is 7 years old, if it has been powered down most of it's life it probably wouldn't last much more than a year if that.

jesus thats a bodge job LOL

And another person selling v8 chips with v6 knock filters

wow!! guess its one of those things hey, you don't know how dodgy it is till you get it then its pretty much too late!

Thanks for posting some pics. Its some rather average construction unfortunately

Yep, total POS. and I don't generally get stung but it sounded like he had sold a few so did it.
BTW that NVRAM was a Chinese replacement as both the ones he gave me corrupted and were unrecoverable, I will post pics of them tomorrow.
The only thing I can say though it worked and is a good backup at least.