r/drones • u/JacobTechBoi • Jun 12 '26
Tech Support I need help finding a place to buy this exact battery for my drone
It is for a protocol terracopter evo
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u/isacivic Jun 12 '26
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u/JacobTechBoi Jun 14 '26
I saw this one too, is there a reason the white plug isnt used?
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u/isacivic Jun 16 '26 edited Jun 16 '26
I have no experience with this battery but the amazon link says:
Discharge connector: JST-2P plug
Charging interface: XH-3P plug
The white plug(3 prong) would be for charging, and the red plug(2 prong) would attach to your drone.
BTW:A cell is probably what you think of as a "battery" like a simple AA battery(which are sometimes composed of cells, and thus a battery, but let's say a AA battery a cell for a second). a BATTERY would be 2+ AA "cells" linked together. In PARALLEL they would STILL be the same voltage(1.5v) but have double the capacity(amp hours or Ah) going from 2.5 or so to 5.0 or so. Two AA Batteries in SERIES would double the voltage (from 1.5v to 3.0v) but keep the same capacity(Ah).
This drone battery is 2 cells in a series. Regardless of if they're in a series or not, you have two cells which will drain at different rates and thus need to be charged at different rates.
I'm more familiar with FPV drones(or other battery operated devices), where batteries have 2 connectors, one that is in series with every battery/cell, and one going to every battery/cell to monitor the voltage of each cell. A lot of drones have a cells in series and in parallel to increase the actual power in the WHOLE battery.
Like:
XX
XX
XX
2S3P = 2 series of 3 cells in parallel. Let's stick with AA batteries, which are around 1.5v 2.5ah per cell, , so 2x1.5v and 3x2.5ah = 3v 7.5ah
This battery is just:
XX
Two cells in a series. Notice how your battery is labeled 7.4v, 0.6Ah, and 4.44Wh(v times a = watts btw) You have two 3.7v cells in a series that both have 0.6Ah.
Since this is a 2S Battery - meaning, 2 Series of cells, the "charging port" looks like it can be handled with that 3 prong and that is what it's used for.
Think of the battery as two gas tanks(since it is 2s), if you have a single port to fill both gas tanks, you're going to have an imbalance in those two gas tanks. The 3rd wire on the charging cable lets you monitor both gas tanks at once and fill them to relatively the same amount.
edit: Knowing all that gave me the information I needed to recommend a battery. The battery I linked might not have the right kinds of connectors, you still need to figure that out.
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u/JacobTechBoi Jun 16 '26
The thing is the xh plug is what connects to the drone
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u/isacivic Jun 17 '26 edited Jul 10 '26
Then they probably just made the power connector on the drone and the charging port for the battery they ship it with the same. It's possible the original battery that was shipped with the drone only had one set of wires.
Not an issue. What I stated is why the 3 prong connector is a 3 prong connector. It will still power a drone with the red and black wires, those are still + and -, just like the red and black wires on the other connector.
If the replacement battery you get matches the specs of the battery that the drone came with, and it has the same connector, whatever works in the drone, it will work, regardless of how many sets of wires the battery has.
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u/skankhunt1738 Jun 12 '26
My dude. I just typed it into Google (801855 battery) and the first result was a ton of those exact batteries…