Batteries ?????

[simon kilvingtonParticipant @simonkilvington38875]

Which Batteries for a RC Boat?

[simon kilvingtonParticipant @simonkilvington38875]

Which Batteries should I get for my RC Century Racing boat ?

As I have watched this video :- **LINK** .

But I am unsure as to the differences that the different changes make ?

What gain do I get from using a 9.6 V battery ? Is it to the speed or the length of time that the battery will last ? Similarly what difference does the "mah" figure will make ? As if try to buy a 9.6v 4500 mah battery from Amazon, it only lists :- **LINK**

However, if I go for a RC 11.1v battery. I get :- **LINK**

Which will is the correct ,?, AND best replacement ? I am more bothered about it lasting longer than the 20 mins the standard battery lasts.

Many thanks.

Simon

[Dave MilbournParticipant @davemilbourn48782]

Simon

Simply put, the voltage affects the top speed while the capacity (in mAH) affects the duration. In both cases the bigger the value then the more speed or duration. Be careful, however, not to go too extreme on capacity as the increased weight will adversely affect the speed. Also higher voltage means more cells, and the pack might not fit into the boat. Don't forget, finally, that racing boats are primarily about high speed for a short time.

These folk sell a huge range of batteries and lots of other goodies for electric power – much more than you'll find on Amazon **LINK**

Dave M

[Malcolm FraryParticipant @malcolmfrary95515]

The battery in the first Amazon link has a clue in the title. It is intended to power a Futaba transmitter, meaning low current delivery for a long time. It will not drive a fast boat without damaging itself.

Like Dave says, look at specialist model trade suppliers, they are likely to carry what you need, rather than what the Amazon and Ebay box shifters would like to shift. Very often, the prices compare well.

More volts makes the motor spin faster, but draws more current and heats things up more up to the point where the magic smoke comes out. For a given capacity, the increased current means a shorter run time. Increasing capacity gives a longer run time but usually means a heavier battery for any particular technology. Lithium batteries tend to be lighter for any given energy stored, and are usually capable of letting it out faster (ie much higher current out) but as a result need more care in handling. Like all other batteries, this means having an appropriate charger, but also means having a low volt alarm in the boat since the easiest way to kill a Lithium battery is to over discharge it.

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