Saturday Night, raining, wind howling and RR all jam packed with Band Gear for the first important gig at a pub chain.
Car in the road, not on the drive ready to go....... Click, clunk dunk. Flat Battery.
I fitted new uprated Bosch 6 months ago.
Got a mate to drop the gear off in his van.
Went to Halfords at 5.30pm Saturday and picked up the 'up to 7 litre' jump leads £39.99, changed my mind and bought the 'up to 3.5 litre' Powerpack £119.99.
Supposed to contain an 800Ah battery. Took 30 minutes to get the clamps onto the terminals in the dark and wet.
Clunk, Click, Dunk. Left the car and put the Powerpack on charge overnight !!

Did the gig, left the gear in the venue, Sunday arrives, take the Powerpack out, connect up.....Clunk, Click, Dunk.
The Powerpack has a 240V inverter in it. Plug a battery charger into the Powerpack and connect to the RR.
4 hours later..... springs into life, first turn off the key.

Wife and I were bedridden with full blown flu for 6 days and then did a couple of short night time, trips to the Chemist and shop with heater and headlights on, so the brand new Bosch let me down.

Nightmare ! Only blessing is that it wasn't at side of the road somewhere miles from home!

You sure it's only 800? Fairly sure the one I just took out was 850, and the upgrade "we" generally go for is
12v 110Ah 920CCA

Hopefully you can stick yours on a good battery conditioner and it
Will bring it back to life.

If it's faulty , lots of them have a 5 year warranty

Good luck mate Alcohol and eBay is never a good mix

2006 4.2 Supercharged, Java Black

Short trips are a killer in this weather, heaters on etc, the fbh will fire automatically if its cold enough and keep running after you have switched the car off..... So even if you are careful it will flatten unless you give it a good run at least 20 mins every couple of days.

I would doubt that the battery is duff being new and just needs a good charge, when its back up and running have a check of the voltages at the battery terminal by using the 753 code or a multi meter, plenty on here about correct voltages. There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

Yep seems to be prevalent happened me also no more FBH for me. I have bosch battery too the larger 920 110 version and its also only about 5 months old having replaced it under warranty after 2 years. Present :2008 TDV8 HSE
Gone Audi A5 2.7TDI
Gone Discovery 3 HSE
Gone Mercedes CLK
Gone Range Rover 2.5 DSE

"You sure it's only 800? Fairly sure the one I just took out was 850, and the upgrade "we" generally go for is
12v 110Ah 920CCA "

No, the Powerpack is 800Ah. The battery is the 'hard to fit' Big Bosch and that is why I couldn't just whip the battery out and take it inside for a charge.