Golf trolley battery takes full 12v.charge. How can you measure whether it will retain that charge in use?
915707
you would need a battery tester. a bad battery may have 12V, but if it's capacity is low, it will only run a short time.
502133
Short circuiting the battery is not a good idea, but it should not explode or leak "acid" as you suggest.  It is actually incorrect to call the inner contents of a standard 9 volt batter "acid" since there is actually no "acid" inside.  Most standard batteries are called "alkaline".\n\nThe wire placed acrocess the two leads of the battery has very little resistance...almost zero (but not quite zero, just a tab above).\nAccording to Ohm's law,\nV = R*I\nwhere V is the voltage, R is the resistance, and I is the current, you can see that with a very small resistance, a very large current will be drawn.  This large current will heat up the wire. Depending on just how much current and the type and thickness of the wire, the wire may or may not begin to glow or melt.\nSoon after shorting out the batter (within a few minutes) the battery will be dead.  An aweful waste of a battery in my opinion.
257773
That is a pretty old laptop.  I suspect the battery may be so old it may never charge and you will have to get a new one.  One option though is to put the battery in the freezer for a few hours and then give it a couple of days to charge up.  Some times this can revive an old battery for awhile longer.
992464
It depends, If you are constantly in one place using your laptop, then there is no charge or discharge done. Keeping it always plugged in is one way, but to prolong it you should use a battery optimizer. Use a search engine to find "laptop battery optimizer" this will discharge the laptop to 0% power and then fully charge it very slow, thus allowing the battery to caliberate. Message me if you have a question.
1116808
I would call dell tech support up and let them know the battery is a dud.  To keep the battery lasting longer fully charge it then let it drain 2 or 3 times right off the bat then fully change it and drain it once a week do not leave the power cord in the computer when you don't need it.  If you do this constently it will kill the battery.
989618
I am pretty sure that as long as the main battery is charged you don't need the backup battery.  It's there just in case your main battery should fail.
913090
google it??  I dont think there are any, a 9v battery is not strong enough to be fatal by itself.  actually, maybe i was wrong thinking that, if the darwin awards can be believed.
169024
MAKE SURE YOUR BATTERY IS GOOD FIRST. NEXT CHECK WIRES TO THE ALTERNATER. AN EASY WAY TO CHECK IF THE ALTERNATER IS WORKING IS, WITH ENGINE RUNNING HOLD A WRENCH ABOUT A 1/4 INCH, ABOVE THE HOUSING. IF IT IS WORKING IT WILL DRAW THE WRENCH TO IT LIKE A MAGNET. THIS DOES NOT MEAN EVERY THING IS OK. IN MOST CASES THE BATTERTY IS BAD, OR THE VOLTAGE REGULATER IS OUT. IT IS INSIDE THE ALTERNATER.
71357
Volts-drop test.\n\nPut the armature on a V-block powered by a regulated voltage source.  Check the voltage across 2 adjacent com segments and repeat as you rotate thru 360 degrees.  They should all be the same.
676845
Volts Per Cell.  I've no idea how many cells your battery comprises, but it's a guidleine to avoid overcharging.
878972
You can actually conduct a simple test on your battery. Leave the laptop on for about half and hour and after charging fully. See if the battery drains fast. If yes then you have to change your battery. Is yours a new note-book or seasoned one. If new then you can actually contact your vendor and inform him and see what he can do for you.
964185
I sense that you have no clue what you're doing. Tell me I'm wrong.\n\nFor DC circuits, Ohm's law says: V = I * R, voltage equals current times resistance.\n\nYour circuit will consist of a battery (voltage source) and a load (resistance) plus the wires to connect them and the meter(s).\n\nIdeally you will test one battery at a time. That way the load will be identical (including the small resistance of the wires).\n\nBatteries typically have two ratings: voltage and capacity.\nVoltage is measured in volts and this decreases as the battery discharges. Capacity is measured in amp hours (current multiplied by time) which specifies how long the battery can deliver a current.\n\nAssuming the circuit resistance is constant (reasonable assumption for your purposes), when you connect the battery to the load, the voltage (independent variable) will cause a current (dependent variable) to flow. As the battery discharges, the voltage will decrease, and the current will correspondingly decrease. You will need a watch or timer as well. Time zero will be when you first connect the battery. Measure the battery voltage at that instant and at intervals. Depending on the load and how fast the battery discharges should determine how frequently you take measurements.\n\nmsg me when you have the data if you need help analyzing it.
526163
A good idea is to use a starter motor, this has low revs and LOTS of torque.\n1 HP = 746 watts, so allow for losses\nA Car battery is measured in AmpHours AH, so theoretically a 60 AH car battery should give 1 amp for 60 hours, however do NOT expect it to give 60 amps for 1 hour, internal resistance, losses, temperature gradient etc.\nif you can find the appropriate meshing gear, use the Starter Motor to drive both rear wheels, simply fit a through gear on the rear drive axle, and engage it to the starter motor - this will take less energy than trying to start a car engine.
797965
What year is the golf cart, I'm thinking you have an older one.  Which has contacts, the others are solid state, unless your talking gas  Need more info
418101
You need the internal resistance. Then based on the amperage due to load you can figure the I^2R loss in watts for the battery.\n\nThe internal resistance can be determined by adding a resistive load to the battery and monitoring the voltage. The point at which the voltage starts to drop equals the internal resistance of the battery.
936680
1.)   The battery contains 4 amp hours of electrons.  This means it can be drained at the rate of 1 amp per hour for 4 hours.\n2.)   So, if you are only draining it at the rate of 1//4 amp per hour it will last 4 times as long or 16 hours.\n3.)   Just think of a battery as a bucket full of water e.i. The slower you pour it out the long it lasts.
999688
Yes.   Piece of piss.   You only use a mower about 1% of the time at most, so even a fairly small solar panel should be able to keep it charged.   Just check that the panel's output voltage matches that of the batteries.