A vacuum that ran on 10 AAA NiMH batteries in series (15.6v at 1.2A) is nearly dead.
I attempted to replace with 6, EBL 9v 1.2A batteries Lithium... bought off a the internet. I connected them such that 3 groups of 2 9v batteries (series) in parallel which should be 18v at 3.6A.
Unfortunately... the vacuum runs for about 3 seconds and then slowly shuts down with my configuration. If I wait a minute, I can run for another 3 seconds. If I leave the vacuum on after 3 seconds, it doesn't run.
As an experiment I got 2, 9v 1.2A Energizer Alkaline batteries from CVS and connected them in series (18v at 1.2A). It runs strong for about 10 seconds before it starts losing some power... but it still continues going. I imagine if I added some more in parallel it would have more power.
Any idea what is going on? I am at a complete lose.