Lead - Lithium Combined - will it work when lead are dead ?

[expresso]

i have my very first chair - over 20 years and i have to say its the best indoor chair for me - i just feel very good using that one indoors - small compact - seat back - it has tilt - P220 - 2 pole motors - Since i dont buy lead never have - the lead in this chair has been a while - i decided to connect my very first small 36ah pack to it so it can have longer battery life -

i wonder - in this situation - if the lead batteries go dead - will get worse - if having the ADD ON combined - will the chair just continue to work off the ADD ON even if the lead is mostly dead - - so i wont have to replace the lead at all ? its only indoor chair - - will charge it maybe once a week if needed or every few weeks - or just wait till green light drops out and then do a nice full charge again -

i also do have another combo chair P222se - which i no longer use outdoors - just dosnt fit me well any more and no comfortable as i once was - none of those chairs are covered now - not looking to replace lead batteries - i have a 60ah ADD ON on this chair -

will it just continue to work off the ADD ON even when the lead goes really dead ?

[Burgerman]

Yes. But it will take more Amps, up to quite a lot at high demand, over 100A at times. So cables will need to be heavy.

But the lead cant go dead as its connected to the non dead lithium...

[expresso]

the cable from the lead to Anderson for the ADD ON - are 8awg - should be good enough - the pack cables maybe 10 awg though - this was done 6 years ago - still working fine 36ah my first pack - i figure i put it to use this way -