7.4v lipo on 7.2v servo

[hardrider]

I am planning to use a KO Propo PDS2123 FET servo.
It is rated at 7.2v and has a blue wire that hooks up to the battery's positive lead.
Any problems running a 7.4v lipo pack with this 7.2v servo?

I ran a 7.4v lipo pack with a Tamiya TEU101BK esc (which is rated for 7.2v)
It worked great but it died on me after a few months.

Not sure if the 0.2v difference was the culprit or not.
But that's quite an inexpensive esc to replace versus a PDS2123.

Any inputs or experiences?

[ashleyb4]

Ive ran my 7.2v servo with my 7.4v lipo and its been fine.

A

[DAVIDZX5]

i also run 7.4 lipo with a 7.2 servo

dave

[ashleyb4]

Also when we charge out NIMH cells they dont stop charging at 7.2v they are always about 8.5 ish volts and a lipo cut soff at 8.4volts so it shouldnt be a problem.

A

[sosidge]

Originally Posted by ashleyb4

Also when we charge out NIMH cells they dont stop charging at 7.2v they are always about 8.5 ish volts and a lipo cut soff at 8.4volts so it shouldnt be a problem.

A

Well, peak voltage on charge isn't really relevant, what is relevant is the voltage under load, and despite their higher nominal voltage (7.4 vs 7.2), LiPos aren't really giving any better voltage under load than NiMHs are right now.

What I am trying to say is that 7.4V LiPos are totally fine in any 7.2V application.

[ashleyb4]

According to my charger my cells peak off at 9.4volts of something like that get the old volt meter out ther eonly about 8.5. And a lipo stops charging at 8.4 volts so yes as said its fine.

A

[SHY]

I thought most servos were made for 6.0 v, some Futabas are even 4.8 v. And doesn't the ESC reduce the output for servo and receiver to 6 v?

("built in BEC")

[Cockerill]

Most servo's are 6.0v, but some FET servo's have a 4th lead that connects directly to the battery, hence 7.2v.

I've used a 7.2v KO 2123 with Lipo with no problems, I've also used it with 5 cells (6.0v) and it was also fine

[MK999]

Originally Posted by ashleyb4

According to my charger my cells peak off at 9.4volts of something like that get the old volt meter out ther eonly about 8.5. And a lipo stops charging at 8.4 volts so yes as said its fine.

A

Think of it like water
This is the 'pressure' or voltage on a closed 'container' circuit, once it starts flowing that 'pressure' will go down a little.

[ashleyb4]

Dont patranise me.

A

[Lee]

I dont think he is ash, he may have been patronising you though

[MK999]

Not even that.

[hardrider]

Thanks for all the replies.
Great point about the peak voltage issue Didn't think of that.
Ok, I can use my 2123 with ease of mind now.