battery upgrade and precision barrel Upgrade questions

[zollen]

1. If I replaced my Prometheus 6.03 tight barrel 265mm with another Prometheus 6.03 tight barrel 285mm, would I see any noticeable performance gains? (I.e. increase accuracy, longer range or better fps..etc)

2. If I upgrade my battery from 8.4v 1600mah to 9.6v 3600mah. Would the more powerful battery eventually damage my VFC SCAR-L CQC and ARES CTAR-21?

[CDN_Stalker]

1/ Nope, I installed a 100mm stock barrel in my MP5 (330mm vs. 229mm) and saw a 20fps increase. Adding one 20mm longer will net you nothing in any form.

2/ No idea about your guns, but 9.6V batteries usually beat the crap out of tappet plates (faster gear spin means greater impact on the tappet). An 8.4V 3600mAh will do you just fine, 9.6V really don't offer much performance increase without internal replacement increases. You'll get a higher rate of fire from both the voltage and amperage increases, but the rate of wear will also increase.

[zollen]

Increasing from 8.4v to 9.6v would increase what exactly?
Increasing from 1600mah to 3600mah would increase what exactly?

[zollen]

Increasing from 8.4v to 9.6v would increase what aspect of performance exactly?
Increasing from 1600mah to 3600mah would increase what aspect of performance exactly?

[CDN_Stalker]

Increasing voltage will give you more power as in motor/gear speed. Is where the problem starts with internals. Higher power surge to the motor makes it spin faster, makes the gears turn faster and the tappet beat itself silly, and makes the repetitions increase.

Amperage increase, even with the same voltage motor, will give your motor the current it needs, you'll get a rate of fire increase from the small battery, but you'll get longevity between battery charges, such as if you shoot 1000 rounds per game day, the 1600mAh will last you all day, but the 3600mAh might last you three full game days without charging, and at a higher rate of fire.

[GBear]

Well, mAh is not the unit for Amperage but Capacity of the battery. Having a higher mAh means that you will have a higher capacity. Intuitively, this also means that your battery will last you longer, without you having to switch it all the time.

Comparing a 8.4V 1600mAh to a 8.4V 3600mAh, you will have the same rate of fire but the 3600mAh will last you much longer with a single charge.

[CDN_Stalker]

mAh is the output ability in amps of the battery (milli Amps per hour)and conversely the input charging rate as well), I just gave him the absolute basics of what I was trying to answer.

[Kos-Mos]

Originally Posted by CDN_Stalker

mAh is the output ability in amps of the battery (milli Amps per hour)and conversely the input charging rate as well), I just gave him the absolute basics of what I was trying to answer.

Wrong, mAh is the capacity.

The reason why a large battery, say a 3600mAh will output higher ROF than a mini, say 1600mAh is the discharge rate.

That is usually in xC, where X is a number between 10 and 45 and C is the capacity in mAh.

A mini battery, 1600mAh have a rate of 10C, meaning it can give out 16A of instant current.

A large battery, 3600mAh have a rate of 20C, meaning it can give out up to 72A of instant current. Current is drawn, not pushed. That means that more is ALWAYS better. If your battery can give enought current, it means the motor will not struggle to get power.

It also means a better trigger response, since a motor is an electro magnet. A magnetic strengh is controled by the current in the coil. Higher current means faster, stronger motor. Rising the voltage also rises the current since the motor (resistance) does not change. If the motor would need 20A to run at 100% it means that the small battery will only deliver 16A... making the motor slower to start. The motor when fired in full auto is technically always starting over at the begining of a cycle.

A larger battery only give out the true potential of a battery.
A smaller battery will cause the motor and battery to eat a lot faster because it works harder.

[GBear]

Originally Posted by Kos-Mos

Wrong, mAh is the capacity.

The reason why a large battery, say a 3600mAh will output higher ROF than a mini, say 1600mAh is the discharge rate.

That is usually in xC, where X is a number between 10 and 45 and C is the capacity in mAh.

A mini battery, 1600mAh have a rate of 10C, meaning it can give out 16A of instant current.

A large battery, 3600mAh have a rate of 20C, meaning it can give out up to 72A of instant current. Current is drawn, not pushed. That means that more is ALWAYS better. If your battery can give enought current, it means the motor will not struggle to get power.

It also means a better trigger response, since a motor is an electro magnet. A magnetic strengh is controled by the current in the coil. Higher current means faster, stronger motor. Rising the voltage also rises the current since the motor (resistance) does not change. If the motor would need 20A to run at 100% it means that the small battery will only deliver 16A... making the motor slower to start. The motor when fired in full auto is technically always starting over at the begining of a cycle.

A larger battery only give out the true potential of a battery.
A smaller battery will cause the motor and battery to eat a lot faster because it works harder.

Charge rate is also given in xC. I know for Li batteries, rapid charging can go all the way up to 1C, or 1*(Capacity of Battery). Other than that, correct, sir.

[CDN_Stalker]

Never knew about the xC rating, learned something today (good job!) and yes, it makes sense since the output is in amps (much higher than milliamps) based upon that xC thing.

Will add (for his info) charge rate of whatever battery you choose is based roughly upon the capacity of the battery and the output of the charger. So if you have a wall wart charger that has a DC output of 1A (or 1000mA), and your battery is 1600mAh capacity, it'll fully charge in about 1.6 hours. A 3600mAh with the same charger output will charge it fully in about 3.6 hours. Just be warned, unless you get a smart charger (at least $60 all the way up to AEG price), you'll need a charger that can handle charging seven (8.4V) to eight (9.6V) cells. I have Prophet Plus I bought in 2003, it can only do up to seven cells fully, but isn't rated for eight cells, but can charge enough to test fire a gun if I worked on it. Never owned a 9.6V before, but fixed enough internal damage caused by them I've had to deal with 9.6V batteries in the past. IMHO, not worth buying, stick with 8.4V.

[Kos-Mos]

Originally Posted by GBear

Charge rate is also given in xC. I know for Li batteries, rapid charging can go all the way up to 1C, or 1*(Capacity of Battery). Other than that, correct, sir.

Correct, except that newest LiPo (high end ones) can go up to 3C charge rate... Nothing that will ever fit in an airsoft gun though...