Question about Panasonic EY7440LN2L 144 Volt LithiumIon Cordless Drill Driver with Flash

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How do you rejuvenate Li-ion batter pack(EY9L40).

I have a Li-ion batter pack(EY9L40) for a drill. How can i repair/Rejuvenate it. I think the module inside is fality. The drill power Flaxuate( bad spelling i know).

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I have batteries and charger uc 18yrl will they fit most Hitachi drills that are a few year's old??


probably not
older chargers were made for ni-cad batteries and now they are li- ion batteries which require a different charger
to distinguish the difference , most manufacturers changed the battery pack design
talk with a battery retailer or a good tool shop or appliance repair shop

Sep 20, 2016 | Hitachi Drills

1 Answer

Can a Ryoby Lithum battery can be repair or rejuvenate?


Yes. The first step is to open the battery and check the condition of the wiring for breaks, corrosion, etc. Also check the condition and voltage for the individual 18650 cells. Ryobi batteries are relatively easy to disassemble using available tools, see posting below.
https://www.ifixit.com/Guide/Cell+Re-balance+of+Ryobi+One%2B+18V+Li-ion+Battery+%28130501002%29/13286
Depending on the findings, some parts may need replacing. If you replace the 18650 cells, use new ones which are easily found on eBay.

Oct 12, 2014 | Ryobi Two 18V Lithium-Ion Batteries +...

1 Answer

Can you use 18v lithium battery in old 18v drill


Yes you can. On tools, 18 volts is 18 volts. Tools don't 'know' how the power is being created, either by Ni-Cad or Li-Ion means. Chargers are totally different. Most Li-Ion chargers can charge older Ni-Cad and some Ni-MH batteries but older Ni-Cad chargers will charge Li-Ion battery untill they overheat and sometimes start on fire because older chargers can't detect when the Li-Ion batteries are full.

Jan 14, 2013 | Black & Decker 18V Cordless Drill/Driver

2 Answers

Who rebuilds ryobi 18 volt li ion batteries


Rebuilding the Lithium batteries is a waste of time and money. For starters the cells cost a minimum of $5 ea and a low power pack takes 5, so now you are in for $25 without doing any work. You can pick up packs on eBay for around $30 - $40 if you shop around. If you know what you are doing, you can strip cells from bad packs and test them to find good ones and then rebuild with those. It can be tricky and you may get mixed results.

Aug 23, 2012 | Ryobi Two 18V Lithium-Ion Batteries +...

1 Answer

My P104 18.0v LI-ION will not take a full charge it has been this way since new


I can't belive this you are the forth person in the last three days that is haveing a problem with these batterys the same problem with the lithium-ion RYOBI combo pack batterys. People are saying they won't hold more then 5 volts and they all got them at christmas. There has to be a big problem with the battery. Although there is no warranty on the battery it self there is a warrany on faulty workmanship and i think you may have to get in line i think this will be a big recall so file now good luck

Jan 16, 2011 | Ryobi Two 18V Lithium-Ion Batteries +...

1 Answer

Can I use the ryobi P110 charger with the P103 lithium-ion batteries ? Thank You


No. The P110 is for NiCad batteries. Any of the Li-Ion chargers like the P113 are backwards compatible and can charge either but do not try to charge Li_ion batteries in a NiCad or NiHi charger.

Dec 27, 2010 | Ryobi Two 18V Lithium-Ion Batteries +...

1 Answer

My Kodak Easyshare Z1275 has short battery life. sometimes even newly charged 2600 MaH batteries cause problems. Powers up, lens extends, opens screen to set time and date then powers down. Sometimes i can...


wait, do you have Li Ion batteries or Ni MH?

I think that Kodak recommends Li Ion batteries which have a higher voltage on them.

I got some generic Li ion battery packs off of Amazon.com, with better specs. than Kodak, and they work fine for my Easyshare z1485 IS camera.

It cost me like $80 to get the charger and two battery packs that are Li Ion, but it's worth it.

My battery packs are rated at 2000 mAh 3.7 Volts each. It's the voltage that counts. You see, if you would split that in half, the voltage for each AA battery is 1.85V which is much higher than the 1.5V that regular Alkaline or Ni MH batteries are rated at.

I tried Alkalines, and Ni MH to no avail. But, the Li Ion batteries, did the trick for me.

Good luck on this 'repair' or battery upgrade.

Jul 23, 2010 | Kodak Cameras

1 Answer

Can a lithium be charged with a nicad charger


You are probably skeptical that maybe the directions telling you not to do that are just intended to get you to buy more stuff. We've all been there. However, Li-ion batteries are very different from nicads. Used incorrectly they can be downright dangerous. So, no, don't try using the nicad charger for the Li-Ion batteries.

Apr 12, 2010 | Ryobi Two 18V Lithium-Ion Batteries +...

8 Answers

Problem charging makita batteries 18v li-ion


Unfortunately, Makita’s li-ion battery packs have a design flaw. After having the same problem with my two batteries, I took it apart and saw the problem immediately. You see each battery pack has ten li-ion battery cells and a circuit board with a memory chip witch holds the charging history of the battery pack. But that memory chip constantly draws power from 2 of the 10 batteries. The current it draws is very small but if you consider it over 8 month or more, the power drain becomes very significant. You end up with a battery pack with 8 still fully charged battery cells and 2 drained battery cells. When you put this battery pack in the charger, it detects weak battery cells, assumes they are defective and refuses to charge. To avoid this problem you should charge your battery pack often, even if you haven't used it, every two months should be ok.
I suspect that Makita doesn’t make these battery packs, they make power tools, good ones too. Buy Makita should definitely have a few words with their supplier before they become a liability!

Aug 16, 2008 | Makita Tools 18V 1/2" Lxt Lithium - Ion...

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