Makita BL1830-2 18-Volt 3.0 AH Battery, 2-Pack
Specification
Product Details
- Amazon Sales Rank: #603 in Home Improvement
- Color: BLACK
- Brand: Makita
- Model: BL1830-2
- Number of items: 1
- Dimensions: 9.75" h x
3.00" w x
6.50" l,
1.30 pounds
Features
- Charging at any time will have no effect on the battery
- More power, less weight, and a better fit
- Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation
- Built-in shock-absorber and memory chip
- One-year limited warranty
Customer Reviews
Most helpful customer reviews
131 of 138 people found the following review helpful.
Faulty design on BL1830
By F64
There is an intelligent circuit board inside the pack that needs to be powered, and it draws its power from the very cells it is monitoring.The basic design flaw is that the circuit is wired to be powered by only one of the many cells in the pack. The board draws a constant although small current from that single cell. If the battery is not used for a few weeks then that cell will deep discharge causing a weak link in the bank of cells, the pack then fails in the charger.Makita has programmed the circuitry so that if you try to charge the battery 3 times in this state, it will permanently disable it. Normal behavior is to think "why is it not charging, let me try again". If more than 1 year old, it is out of warranty.Makita should step up, redesign the battery, and offer on their website to replace any batteries which have not been abused with the new design.I would not buy any more Makita tools powered by this battery.
154 of 165 people found the following review helpful.Great batteries, but they have a short life due to a bug
By Opti Mystic
I love these batteries and the tools they power. They deliver more energy than my other brand 18 volt tools. The Makita smart charger charges them in 20 minutes. Wow, great battery! I should be happy, right? Partly I am, but partly I'm not. I am concerned about the huge number of premature failures people are reporting here and in the single BL1830 battery reviews. There's a problem and Makita is ignoring it.I did a lot of research on the net about this. My conclusion: this battery has design flaw that shuts down these batteries prematurely. It won't happen to everyone, but if the battery sits discharged for a long time, it's very likely to happen.Background: Lithium batteries can burn or explode if abused. They need monitoring, for safety reasons. So like everyone, Makita put in a smart control board in the battery pack. The control board monitors charging voltage, current, battery temperature, number of charges, and remembers all that. Sounds good, right? But.. there is a design bug. The battery control board draws power only from the first cell of the 5 cells in the battery. If you leave it sitting for a while, the control board will discharge that first cell to zero, while the others remain charged. To the control board or possibly the charger, that looks like a shorted cell, which could overheat, and the control board remembers it. If you try to charge it 3 times with an apparently deep discharged cell, sudden death! The control board tells the charger that the battery is unsafe to charge, and prevents charging in the Makita charger -- permanently.The key evidence is the apparent dead cell is usually that first cell, the one that powers the control board. Very likely the battery is still usable. It can probably be recharged on third party chargers that ignore the control board -- but never again on a Makita charger. If you have a dead battery, you could try to charge it on an aftermarket charger. They cost about $50, a lot less than a new battery.If you read the reviews for the single BL1830 battery, you will see that a lot of customers, about 1/3, are angry about these premature failures. Makita has extended the warranty if the battery fails before 150 charges, admitting they know about the problem. It's not enough. We should not have to deal with premature failures caused by a known design defect. Who has time on the job, and who has money to throw away?I can think of many ways to fix this. For example, Makita could reprogram the battery control board or charger so it did not lock up a good battery, or the control board could draw power from all 5 cells so this is less likely to happen to a single cell, or use a separate coin cell for the control board, or ... well, as you can see there are many possible ways to address this. My point is that Makita's engineers need to pick a solution and fix this problem.As I said, I really do love these batteries and tools. But this serious problem has been identified, and it needs to be fixed. In my opinion, Makita should recall these batteries and fix this problem, and release a better battery design for new sales. If not, Makita's reputation will continue to suffer, and there could be a class action lawsuit too. Makita is infuriating customers and destroying its reputation.
70 of 76 people found the following review helpful.Serious battery design flaw significantly devalues good makita tools
By RJ
There appears to be a serious design flaw with these batteries that can be researched on the net. The result is you may only get 1 year of use from these batteries. I have about $1000 of the LXT tool line. These are good tools who's value IMHO is seriously diminished because of a battery design fault. I purchased these tools about 1.5 years ago with one battery. I purchased a second battery about 1 year ago. They were lightly used for weekend projects and I stored them indoors and charged. One battery died in February and the other died in July. So they each lasted about one year each. I'm shocked! I purchased the Makita cordless line because I still have a 21 year old 12v Makita cordless drill that works like the day I got it. Two years ago I took apart our 12x20ft deck, refinished it and reassembled it with the 12v drill. I managed to reassemble about 95% of the deck on one battery charge!! amazing! I still have it and it still works great with the original batteries that are almost 22 years old now. So, I decided to go with Makita LXT line when I wanted to upgrade to more cordless tools. However, I use and store the new tools the same as the old tool and the new batteries both died in about 1 year. Many others are reporting this problem. The LXT line are good tools with lots of variety but I'd SERIOUSLY think before investing in these tools due to the defective batteries. They failed when I really needed them and am basically stuck spending serious money as they fail to keep using the tools I have. Makita - you really screwed up.
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Faulty design on BL1830 There is an intelligent circuit board inside the pack that needs to be powered, and it draws its power from the very cells it is monitoring.
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