Discovery 2 dead battery

Hi, I have a 2004 discovery td5 and Every time go to start it the battery is completely dead. It’s been converted to springs and I’ve disconnected the air suspension electrics and took out interior lights that were staying on when not in the vehicle. It’s had 2 new battery’s and the terminals have been cleaned. The alternator is charging and I’ve done other battery tests. Can anyone help me?

This happens sometimes, a methodical approach is what you need.
Leave the bonnet open with everything switched off for a while then get your multimeter out and start checking at each fuse to see if you can locate which one has a current draw on it.
I take it the battery is a good make and plenty powerful enough.
Does it do mainly short runs or not?
Also the terminals are notorious for giving a bad connection. they need to be bashed on with a hammer and socket or something before tightening the stupid bolt thing. Ministry of Cr@p Design, i'm afraid.
and when you say the battery is "dead" do you mean it just won't turn the engine over on the starter or do you actually put a meter on it and find it is less than say 12.5 volts?
The starter solenoid contacts also go after a while.
Try charging it up, using the vehicle then when you stop, disconnect the batt.
(Lock the door with the key)
Then reconnect and see if the batt is still OK. If it is, the problem isn't the batt the terminals or the charging circuit. (Or the starter if it still works). You deffo have a parasitic drain of some sort.
If after charging the batt seems to be ok, you may have to keep on doing this rigmarole before you get to the problem. In lockdown I found this happening and it was simply down to lack of use. The alarm system etc was slowly running it down.
Best of luck

Daniel harrison said:

Hi, I have a 2004 discovery td5 and Every time go to start it the battery is completely dead. It’s been converted to springs and I’ve disconnected the air suspension electrics and took out interior lights that were staying on when not in the vehicle. It’s had 2 new battery’s and the terminals have been cleaned. The alternator is charging and I’ve done other battery tests. Can anyone help me?

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Hi. The fact that you removed SLS parts and bulbs is irrelevant. Did you set the SLABS to coils with diagnostic tool? If not and the interior lights stood on means that one door switch is not working and keeps the SLABS and BCU awake like when a door is opened and these would drastically increase the quiescent current draw. You have to find which door switch or circuit is bad and fix that first then if the problem persists you can dig further