Hey All,
I purchased the Seidio 1750 for $33 and thought that I would run some tests comparing it to the stock battery.
It’s important to note that the stock battery has been cycled many times. I have owned it for exactly 30 days at the time of this test. So it has had at least that many cycles on it.
Both batteries are Lithium Polymer (LiPo). LiPos have a minimum and maximum voltage threshold. The lowest voltage they can safely withstand is 3.0V. The highest voltage is 4.2V. Charging the battery increases the batteries voltage. The opposite effect for occurs when discharging.
The test I ran is very basic. I simply take a fully charged battery. I then discharge it to 3.0V and measure the time it took to discharge and the Milliamp Hours (mAh) removed from the battery. I then charge the battery to 4.2V and measure the same thing, time and mAh. mAh is a measurement of battery capacity.
The charger I used is a high end Lithium charger for Radio Controlled Cars. Here is a link for those interested in the specs/info.
Common Sense R/C Bantam E-Station BC610 Power 10A Lipo DC Battery Charger, CSRECH610
On to the results. When I got the Battery, it was approximately half charged.
Seidio 1750 Initial Full Charge
Start Voltage: 3.85V
End Voltage: 4.20V
Charge Rate: 0.5A (Was too slow so I upped it to 1.0A)
mAh Input: 77mAh
Charge Rate: 1.0A
mAh Input: 504mAh
The battery sat overnight (11 hrs) and I assumed it would have leveled off and could use a little more charge before I started the discharge test. It is a new battery…
Charge Rate: 1.0A
mAh Input: 53mAh
Total mAh Input: 634mAh (77+504+53)
Seidio 1750 First Full Discharge
Discharge Rate: 0.5 Amps
Start Voltage: 4.20V
End Voltage: 3.53V
Time to discharge: 160 min (charger’s timeout due to safety)
mAh discharged: 1298mAh
Start Voltage: 3.53V
End Voltage: 3.00V
Time to discharge: 23 min
mAh discharged: 186mAh
Total Time: 183 min
Total mAh Discharged: 1484mAh
Seido 1750 First Full Charge
Charge Rate: 1.0A
Start Voltage: 3.50V
End Voltage: 4.20V
Charge Time: 136:04 min
mAh Input: 1392mAh
Stock Battery Discharge (not fully charged)
Discharge Rate: 0.5 Amps
End Voltage: 3.0V
Time to discharge: 95:09 min
mAh discharged: 770mAh
Stock Battery Full Charge
Start Voltage: 3.38V
End Voltage: 4.20V
Charge Time: 120:12 min
mAh Input: 1143mAh
So we can see that the Seido took longer to charge and it also took more mAh. This means that thus far, the Seido has a higher capacity than the stock battery. Comparing discharge times is even more relevant to us though as that is what we all care about. “How long will the battery last while being discharged?”
I still have to do a full discharge on the stocker. Ill post it when its done.
Now I know that this test is not completely accurate due to slightly different time between charge/discharge, charge/discharge interruptions due to time constraints or charger timer, etc. Once the 1750 has about 10 cycles on it at least, I would like to run a very controlled and more accurate charge and discharge test. But for now, this gives you the idea.
I also posted this on the other battery thread. I hope that doesnt violate any spamming rules or something
