Suspension and Chassis Battery for weight reduction

[Ruben_i20N]

Good afternoon,
I am considering ways to reduce weight at the front of the car. I have ruled out installing a carbon fiber or fiberglass hood, as the weight difference compared to the original is barely 3–4 kg (based on a comparison between the stock hood and the EPR brand version sold on Alibaba). link
My second option is to install a LiFePO4 battery; the car is used only occasionally for mountain road driving and short trips—and perhaps track days in the future. There is a significant weight difference. The option I have been considering is this one:

40Ah | 12,8V | 1200A | Lithium Starter Batterie | integriertes Multi Dynamic BMS​

With this charger, to charge it when necessary.:
CS-ELECTRONIC XF1205 Automatik LiFePO4 12V/5A Ladegerät im Metallgehäuse -120W-

I have a few questions about installing a battery with these specifications.
1- Will the LiFePO4 battery suffer from being near the engine, given all the heat generated?
2- Will the car be able to manage the charging of a battery that differs from the original without issues?
3- The original battery is 60Ah and the LiFePO4 is 40Ah (Pb-eq 90Ah) ; will this be sufficient so that I don't even need to buy a charger, and will the battery avoid going dead if I only drive the car once a week?
4- Is it worth buying a lighter battery or moving the original one to the trunk?

Greetings!

 

[YNWaN]

I have a Deadweight Industries Touge 500. On the plus side it is very light and does start the car. On the negative it doesn’t charge, or hold charge, as well as a standard battery and the nanny electronics mean it appears dead when it does still have charge. So it will all be fine - then you go to start the car and it won’t have it - or open the doors etc. So really it needs to be on a trickle charger when not being used.

Oh, I also have that exact bonnet you have linked to - but I didn’t pay that much for it. As you say, it is lighter but not by a huge amount. I guess you could cut the inside support out (which is where most of the weight is) and use bonnet pins all round.