A nickel–metal hydride battery (NiMH) battery is a type of rechargeable battery. They have a better energy density than nickel–cadmium batteries (NiCd or NiCad) and have largely replaced them in many applications.
2
votes
2answers
101 views
How to power up BeagleBoard-xM using batteries?
I 'm looking for a battery solution to power up BeagleBoard-xM. Until now, I used a 5 V, 3.2 A AC/DC power supply adapter (2.1 mm barrel plug).
I 'm thinking of using a 4 x 1.2 NiMH AA battery pack ...
0
votes
0answers
20 views
NI-MH battery charger using MAX712
I don't belong to electrical engineering but I am trying to develop a intelligent Ni-Mh battery charger for one of my project. I am using MAX712 battery charging management IC. Reason behind that is
...
0
votes
2answers
90 views
Sanyo battery: what 430MH stands for?
I have a SANYO NI-MH battery from my Oral-B toothbrush. I reads 430MH. Now I'm curious what does 430MH stand for?
Im thinking its probably nickel–metal hydride if ...
0
votes
2answers
92 views
NiMH battery charging by MAX712 IC
I am using MAX712CPE(DIP) version for charging 1.2 volts × 8 batteries. Using the datasheet and available information on the Internet, we made the circuit schematic and are about to implement ...
1
vote
3answers
197 views
Step up DC-DC converter for powering Raspberry Pi from batteries
I will power a Raspberry PI with 4 NIMH batteries, but they quickly lose charge, and end up at 3V instead of the 5V needed. I was wondering about a DC-DC step up converter.
I want a converter that ...
0
votes
1answer
63 views
Electric toothbrush charging time [closed]
I replaced my old Ni-Cd 1.2 volt sub-c battery (1500 mah) from my electric toothbrush to a new Ni-MH battery 1.2 volt sub-c (3800 mah). I looked inside the toothbrush and it look like there is no ...
1
vote
1answer
79 views
How to use Battery Charge controller (BQ2002N)
I am working with an Arduino which I have a 12v power supply for, but also needs to be able to run off a NiMH/NiCAD battery pack when not connected, and recharge the battery pack when it is connected.
...
2
votes
1answer
157 views
Get 12v power from NiMH battery
I have an Arduino project that
is powered from 12v/15A dc power source
needs to switch to battery power and still get 12v (dc power may start/stop at any time)
recharge the battery when dc power ...
0
votes
0answers
66 views
What is the best rechargable battery for very low and variable current input?
Any recommendations for a battery that will last 5+ years, will have low self discharge, and will be able to charge off very low current inputs (10s of uAs)? It will be running a circuit designed for ...
4
votes
4answers
726 views
Is soldering wires directly on a NiMh battery safe?
I'd like to know if soldering two wires directly on a NiMh battery is considered as safe or not.
My fear is that battery would explode (right in my face) because ...
1
vote
1answer
166 views
Should my NiMH battery powered circuit/device switch power sources when charging?
Details ---------------------------------------------------------------------------
Battery Supply: 2.4V (2x NiMH 1.2V - 1500mAh batteries )
Charging Supply: 5V (USB Power Adapter / Wall Wart)
...
1
vote
1answer
437 views
3.6V NiMH smart charger, microcontroller, auto switch over from DC in to battery
I'm working on an agricultural pump monitor project using a microcontroller. It needs to be able to operate ~1 hour after power failure, and signal same.
I'm hoping there are maybe single chip, or ...
5
votes
1answer
2k views
Arduino Runing On && Charging NiMH batteries
I have a project I'm working on that will have an Arduino running on 2 or 4 rechargeable NiMH AA batteries. I say 2 because I might boost up the voltage to what's needed. My problem is that this ...
0
votes
1answer
96 views
Battery charger for AA batteries
I am looking for a battery charger for AA batteries, without taking out the batteries from the board.
The board which is powered by AA batteries is : ...
0
votes
0answers
75 views
Recycling a notebook battery pack
I've got an old battery pack ( from DELL ) to dismiss because batteries are gone. The battery contain an SMD board that I think being the charger module, and I would like to ask if that module can be ...
7
votes
3answers
427 views
NiMh or LiPo batteries for unattended charging/usage
I'm in the planning stage of a summer project: A WiFi controlled robot for remotely monitoring a shore home. The robot will consist of a 4-wheel platform (4 motors, 1 A stall current each, 7 V), ...
0
votes
1answer
148 views
powering android phone from 3 AA battery directly (not USB!) [closed]
I have Sony Arc phone which was spoiled by me (story OutTopic) as it won't charge lion battery anymore. the phone itself works perfectly. I don't want to do the regular 3AA to USB charger way. Trying ...
6
votes
2answers
456 views
Alternative recharging methods for a toy car
Question: I would like to know about alternative recharging methods for a rechargeable toy car.
Synopis
I have the Fisher Price Shake n Go Xtreme car and track set. The cars are problematic in two ...
4
votes
5answers
188 views
Choosing the type of battery for a project
I am working on a machine which consists of 10 servos, and one microcontroller. The servos need to be on pretty much all the time for about 8 minutes. I am planning on using the ATmega16 to provide ...
-3
votes
1answer
252 views
How high charging temperature causes damage to AA size NiMH cell
I used a portable thermometer and put on top of a battery charger. I notice that the temperature reach 39 degree Celsius and I can feel the warmth when I put my hand on top of the charger & the ...
2
votes
2answers
268 views
How fast may I trickle charge a full LSD NiMH battery?
I've bought two packages of low-self-discharge nickel-metal hydride AA batteries, each made by a different well-known battery manufacturer.
Sadly, the datasheets aren't very detailed:
• One ...
2
votes
1answer
138 views
LSD NiMH cells that provide reasonable capacity even in subfreezing temperatures
Sanyo claims that 2000 mAh Eneloop LSD AA NiMH batteries provide about 1400 mAh at -10 °C (-15 °F).
I wonder if only Eneloops provide reasonable capacity in the cold, or if the competition does too. ...
8
votes
2answers
720 views
LiPo vs. NiMH for kid's toy
I've been researching here and on google regarding potential battery technologies for a toy that I want to make for my kids. I was hoping to get others' perspectives on this, keeping in mind that ...
7
votes
3answers
5k views
At what voltage is a NiMH battery empty?
I have a battery pack of NiMH batteries. It is ten cells with 1.2V, 4000mAh each, put together in series. So rated voltage is 12V. After charging, i.e. when the charging device says that it is ...
