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I still have not made up my mind what to do with my City-EL. Lithium batteries has been tried in the UK about 2 years ago then it was mysteriously sold. Story ended right there- no plusses, no minuses- nothing.
Out of about 60 C-ELs sent to Sacramento in 1992-1993; I have one of about 5 operating. I have seen 4, but only 1 has lithium batteries (as of Oct. I think) instead of the 4 lead-acid deep cell batteries. Not enough "trial and error" for me to know for sure if I should go that route.
With a primary, secondary, and that computer circuit charging circuit, deciding which batteries has always been a problem- several times I have charged all 4 batteries one by one (that got VERY old VERY fast!) then I just lost patience and left those computer power sources 'on' along and used an external charger at the same time- takes about 6 hours. I think I will get 4 lead-acid batteries from Costco- even that price is terrible: $280.+ but the ones in it were $1300.+. Lithium batteries are very expensive.
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