4.8 Volt ZZSE

[urbanavenger]

*I tried the Layman's Cell mod on my ZZ SE. I went to a local battery specialist in here in Michigan and had them custom weld me a 4 button cell with 4, 1.2 volt 40 mAh batteries in series for a total of 4.8 volts! The batteries were made by Varta and are the exact same batteries mentioned in Layman's post. I am sure of that since I also ordered the Layman cells.

I was really happy to get the custom battery when I saw it was welded and shrink wrapped and best of all It was almost the exact same size as the stock 2.4 volt battery. In fact when I fit it in my ZZSE there was no modification required.

So what happened... The proportional steering and drive both seemed to work since when I held the Zip in my hand and let the wheels spin it seemed to fly. However as soon as I set it on the floor and went I realized that the ZZ was SLOW. It seemed as if the ZZSE now had no torque. At first I thought that I just needed a charge in my battery. So I promptly went to a friends with a R/C hobby peak charger. I charged the batteries at .5 amp. When I attached a lightbulb and then a 5V LED directly to the battery the lamps lit up brightly. I definitely had good power. Yet still the ZZSE was slow (about half of the normal speed, with stuttering).
When I put the original battery back in, the ZZSE was back to normal.

I believe this problem may be related to one of the components on the PCB operating out of spec. Over Volted. I'm guessing that the part that was faulting was the A/D/A converter itself. But that is just a guess.

Long story short I think we need to get these new ZZSEs faster. I loved the results achieved when adding 1 or 2 extra batteries to the original ZZ and I am really hoping that we can get the same or more speed out of the ZZSE.

[Jtskty]

Hmm, one of you guys with mosfets should try that and see your results.

[TypeZer0]

it's possible that due to its low capacity and probably high drain from the pcb that these batteries are unable to cope with the high current draw. though the mAh rating doesn't dictate how much current can be drawn from it, it's an ok indication on much current can be drawn from it before it starts giving juice in bursts or simply burst in flames or whatever. i remember my black mustang zipzap was able to draw over 200 mA for the motor alone (multimeter was limited to 200 mA and it gave me the overloaded indicator) so when i stuck in three layman's cells in series and charged it up, i was moving in bursts of great speed. faster than dual cell....for about 1.5 seconds then 1.5 seconds of slowness and this went on and on until the batteries were completely drained after like a minute. if i had a peak charger it could have probably coped much better but i didn't