vic7767 wrote:You've pointed out what many of us have experienced with the newer model (XV-21) Neatos. There was a run of poorly built (lowest bidder) battery packs that Neato is replacing when the low run times are reported to them. I've built some custom batteries that are 4500 mAH that improved the run times somewhat but nowhere near an hour.
What model did Neato send you ?
vic7767 wrote:What model Neato did you install the 3800 mAH packs into ?
glnc222 wrote:The Prius hybrid car manual says their battery is never discharged below 30 per cent in normal use, and is warranted for 10 years etc. 70 per cent of the 4500mah batteries is 3150 close to Neato's original 3200. 70 per cent of 3800 is 2650; is that less than Neato's draw in use? If Neato draws 3 amps (not known exactly) and runs 50 minutes as observed on carpet, it uses 2500mah in the run -- within a well-margined 3800 battery. It would be interesting if the much cheaper 3800's can provide as much life as the 4500's. Special equipment is needed to measure battery life in reasonable time through some accelerated, intensive procedure -- more difficult than just determining capacity. It's interesting how battery sellers have very little data about their batteries and their applications, or at least never publicize it. Maybe they don't like to admit they run down at all.
djos wrote:Once I get them i'll report back on what sort of run-times they produce.
I have done a lot of work with NIMHs and NICADs when I used them for RC racing. The discharge curve is not flat in the middle. In fact it is very linear with a constant slight drop in voltage over time. I feel that voltage alone can be used to determine capacity.
Osteo wrote:Hey OP, is this the battery, and if so was it a single or two pack? I'm out the door to go to work, looked quickly, and don't see mention of it being a single or dual pack of batteries... Thanks in advance!
http://www.amazon.com/945-0005-7-2v-350 ... s+945-0005
one of the 3800mAh packs from Amazon. I think it was mislabeled as 3500mAh
djos wrote:My XV-11's batteries have got down to 30mins run-time (from about 60ish a year ago) and I was going to send them to Vic for upgrading to 4500mAh but funds are a bit tight atm (bub #2 due shortly) and so I've ordered some 3500mAh Neato batteries from ebay seller "uk-expert". Unlike many of the other Neato battery sellers on ebay these guys seem to specialize in batteries so Im hoping they are worth the $50au (inc shipping).
Once I get them i'll report back on what sort of run-times they produce.
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