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dano78

hi there i have just brought a milwaukee m18 combi drill and have been using it on site this week the batterys dont seem to have a long run time was just wondering if any one else has found this or do i have duff batterys,the guy in the shop told me the batterys get better after about 10 charges and i think he might be write any responce would be great because if they are still crap i am going back to the shop to kick off as i was going to buy the makita lion combi which i know has great battery life but he talked me out of it ,any advice would be most well come thanks.
 
i have never heard of that one before but i may be wrong

I know that you should run it till its flat before recharging fully as with most battery operated items

I would wait for the 10 times of charging and if not any better grab your dummy and hurl it out of the pram and get the Makita
 
Milwaukee stuff is good so you should have no problem.

Yes, the batteries will take more charge as you use them.

Never put them away discharged as this will reduce the life of the batteries.
 
Try this

[FONT=Verdana, Arial, Helvetica, sans-serif]Battery research is focusing heavily on lithium chemistries, so much so that one could presume that all portable devices will be powered with lithium-ion batteries in the future. In many ways, lithium-ion is superior to nickel and lead-based chemistries and the applications for lithium-ion batteries are growing as a result.

Lithium-ion has not yet fully matured and is being improved continuously. New metal and chemical combinations are being tried every six months to increase energy density and prolong service life. The improvements in longevity after each change will not be known for a few years.

A lithium-ion battery provides 300-500 discharge/charge cycles. The battery prefers a partial rather than a full discharge. Frequent full discharges should be avoided when possible. Instead, charge the battery more often or use a larger battery. There is no concern of memory when applying unscheduled charges.

Although lithium-ion is memory-free in terms of performance deterioration, batteries with fuel gauges exhibit what engineers refer to as "digital memory". Here is the reason: Short discharges with subsequent recharges do not provide the periodic calibration needed to synchronize the fuel gauge with the battery's state-of-charge. A deliberate full discharge and recharge every 30 charges corrects this problem. Letting the battery run down to the cut-off point in the equipment will do this. If ignored, the fuel gauge will become increasingly less accurate. (Read more in 'Choosing the right battery for portable computing', Part Two.)

Aging of lithium-ion is an issue that is often ignored. A lithium-ion battery in use typically lasts between 2-3 years. The capacity loss manifests itself in increased internal resistance caused by oxidation. Eventually, the cell resistance reaches a point where the pack can no longer deliver the stored energy although the battery may still have ample charge. For this reason, an aged battery can be kept longer in applications that draw low current as opposed to a function that demands heavy loads. Increasing internal resistance with cycle life and age is typical for cobalt-based lithium-ion, a system that is used for cell phones, cameras and laptops because of high energy density. The lower energy dense manganese-based lithium-ion, also known as spinel, maintains the internal resistance through its life but loses capacity due to chemical decompositions. Spinel is primarily used for power tools.
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hi there, i work for a powertool company and whilst the Milwaukee tools themselves are very good, their batteries arent unfortunatley. Their 18v 3.0Ah Li-Ion batteries are very unreliable. I have lost count of the number of them i have sent back to Milwaukee for exchange under warranty. My company has now stopped selling the Milwaukee tools with the Li-Ion batteries.

The batteries will improve after a certain amount of charges thats true but if your still unhappy then take the machine back to where you bought it and you can get replacement batteries from Milwaukee.

I do have to say that the Makita machines have no issues with their batteries. If your going to go for Makita then make sure you get the 3 speed version with the metal keyless chuck as opposed to the 2 speed version with the plactic keyless chuck, the 3 speed version is a much better machine and has a much stronger gearbox.

Hope this helps!
 
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dewalt liion need a 10-11 hr initial charge to ensure good battery life apparently if you dont give it a good initial mega charge they can suffer from short battery life
 
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