• 298 Answers SOURCE: NiCD and LiOn batteries have this tendency. They work great for a year, then slowly die off. The problem is you. When new, the device MUST be charged for 14hr nonstop, then every 2-3 months run dead, and recharged again 14hrs nonstop. This is done so the CPU of the Roomba (cool toy) KNOWS what DEAD is and what FULL is.

Carlos do carmo concert. Vacuums - How do I charge the Dynamite AutoPower 300A?- question about Vacuums. Probably have a bad battery pack, your owner manual should tell you how to replace it. My Electrolux Pronto is not charging. When I put the Vacuum stick on the charging stand, the purple light goes on for about 5 seconds and then it will be off.

It does this by measuring the amount of currrent flowing thru a very precise resistance. If you do hit and miss charge cycles of the roomba or leave it charging too long, it either develops a flase memory of the above two conditions, or gets HOT and the electrolyte paste dries out. Fix is to wear it out, charge 14hrs, wer it out againand repeat 3-4x. Then recharge and use. If that doesn't fix it, the batteries are too dried and need to be replaced. Posted on Apr 08, 2009.