Robotics Stack Exchange
Robotics Stack Exchange

Questions tagged [battery]

An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

124 questions
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How to charge a LiFePO4 battery?

From what I've seen, LiFePO4 batteries seem like one of the top battery choices for robotics applications. However, I've seen people mentioning that you can't use a charger for a different battery to charge these, but I haven't seen why. If I were…
golmschenk
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How to know when a Li-Po battery is discharged?

I'm building a quadcopter and I've seen that a Li-Po battery must not be entirely discharged, otherwise it could damage it. How do you know when you have to stop your quadcopter or robot in order to prevent damages, since the voltage doesn't drop?…
mimipc
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Mechanical robustness/shock resistance LiPo batteries

How mechanically robust are LiPo batteries? How much force or acceleration can they maximally withstand before failure? What is their (mechanical) shock resistance? For some electrical components used in robots, such as IMU's, it can be found in…
JJM Driessen
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How much can realistically be drawn from a 25C max 50C battery?

I am using 8 brushless motors for an octocopter. Each motor can be run at maximum 30A. I use 4 batteries in parallel. How high C number is needed? $$\frac{30*8}{4*2} = 30C$$ When running the motors at 100% load, it will draw 30C from each battery.…
Friend of Kim
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Battery pack discharged

I used a Turnigy 2200mAh 3S 25C Lipo battery pack with Turnigy balancer & Charger 2S-3S for about a month. Yesterday I left the battery plugged into four ESCs of my quadrocopter. Today I've found the battery totally discharged. When I tried to…
Kolyunya
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How to decide between LiPo or LiFePo for robot battery

When choosing a battery for a robot, should you use a LiPo or LiFePo? For LiFePo, the pros: can deliver higher sustained amps many are built to be drop-in replacements for lead-acid batteries and can use the same charger The cons: enormously…
Cerin
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Salvaging a bunch of laptop battery packs

I'm working on my first robot project. I previously used a 12V 6Ah sealed lead acid battery, but recently I aquired some 15 ASUS Li-Ion battery packs, each of them 14.8V and either 2200 mAh or 4400 mAh. The laptops have been discarded, and some of…
frodeborli
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Crimp or Solder to LiPo Battery?

So, I'm planning out my second hobby robot(I'm 15). I am planning on using a 7.4V LiPo battery and my idea is to solder on a 3-pin header to connect to the electronics. Anyways, should I solder to crimp terminals and then attach it to the pack? Or…
Zack Frost
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how to know if the LIPO battery I have is compatible with the motors and motor driver I have

I am building a robot and I have a concern. Will it properly connect a 11.1V 30C 4500mAh to this motor driver : https://www.pololu.com/product/708 thanks in advance ..
ShehabAldeen
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Parallel connection of batteries with equal voltage but different Ah?

I bought some batteries for a project with the recommended voltage but too weak Ah. The batteries are to be connected in parallel. I can't currently afford to upgrade both batteries, but I was curious if I can try upgrading one of them and…
Hack-R
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Charging multiple LiFePO4 batteries at the same time?

I'm looking to use 4 of these 3.2V LiFePO4 batteries. I intend to have 2 pairs of 2 in series in parallel. So two 6.4V battery packs in parallel. Because my setup will be run off of this, it will also be easiest to recharge the batteries using the…
golmschenk
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Can I charge a 12 Volt 2 Ampere UPS with a 9 Volt 0.6 Ampere Adapter?

I want to power up an Arduino toy car with this UPS but I am not sure if I can charge this UPS with a 9 Volt 0.6 Ampere power adapter.
Exspiravit Dominus
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using Li-Ion batteries in parallel

Looking at the Li-Ion battery packs from Servocity, part #605056, 12V, 6000maH battery pack. Any reason I shouldn't put these in parallel with each other? Any idea on what these might weigh? I've got a robot project going, currently running on a…
stevereine
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Powering a 6v servo and 12v servo

In my project, there are two types of servos ( 6v and 12v supply needs ). I need to power with the same battery. How should I go about it? Use a 6v battery with a step-up voltage regulator? How does that impact the battery power calculations? If…
Dharmesh
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Choosing a battery: is a harbor freight solar battery OK for a R/C Lawnmower?

I have built an R/C Lawnmower. I call it the Honey Badger, because it tears stuff up (that's a good thing). Well, I used used batteries to get the project going and now it's long past time to get the Honey Badger going again. The Honey Badger is…
YetAnotherRandomUser
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