Question about Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451
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 6 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. But Makita should definitely have a few words with their supplier before they become a liability!
Posted on May 27, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 21, 2015 | Drills
Mar 12, 2015 | Makita Cc300dz 10.8V Li-Ion Cordless Tile...
Oct 26, 2013 | E-Flite Eflc3110 2-3 Cell Lipo Balancing...
Jan 10, 2011 | Averatec 3200 Notebook
Dec 17, 2010 | Nikon MH18a Battery Charger
Dec 07, 2010 | Ridgid Drills
Mar 05, 2010 | Olympus Stylus 790SW Digital Camera
Jul 11, 2009 | Makita 12 Volt Cordless Drill/Driver Kit
Nov 14, 2008 | Olympus FE-230 Digital Camera
1,203 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: