Compatible Makita Part Numbers:

BL4040  BL4040-2  BL4050  BL4050F  BL4020  BL4025  L4040  L4030  L4025  L4020  373WA9  380HR0

Compatible Makita Power Tool Models:

GAG07Z  GAG08Z  GAG01Z  GAG03Z  GAG04Z  GAG06Z  GAG10Z  GAD01M  GAD01Z  
GAD02M1  GAD02Z  GFD01D  GFD01Z  GFD02D  GFD02Z  GPH01D  GPH01Z  GPH02D  
GPH02Z  GDT01D  GDT01Z  GT200D  GT400M1D1  GT401M1D1  GWT07D  GWT07Z  
GWT08D  GWT01D  GWT01Z  GWT04D  GWT04Z  GWT05D  GWT05Z  GRH07Z  GRH07ZW  
GRH06Z  GRH01ZW  GRH01Z  GRH02Z  GRH05Z  GMH02PM  GMH02Z  GMH01M1  
GMH01Z  GLC01R1  GLC01Z  GRM03  GRM01Z  GRM02  ML003G  ML006G  ML001G  
ML002G  CF002GZ  CF001GZ  GSL02Z  GSH01Z  GSH02Z  GSR01Z  GSR02Z  GSL04M1  
GSL04Z  GSL03M1  GSL03Z  GSL02M1  GRJ01M1  GRJ01Z  GPS01Z

1-Year Warranty

All our JJY-MAK-BL4050F replacement batteries are engineered to meet or exceed original specifications. We provide a 1-year limited warranty covering any manufacturing defects. If the product fails due to inherent quality issues within the first year, we offer a free one-to-one replacement service (subject to proper installation and standard usage).

FAQs

Q: How do I check if this battery is compatible with my Power Tool?

A: First, find out the part number of your old battery or the model name of your power tool (e.g., ' BL4050F ') and match it with our product compatibility table. Second, please compare the old battery with our product images to make sure their shapes are the same. Lastly, check that the voltage (rating) is the same as the old one.

Q: Do I need to charge the new battery for 12 hours for the first time of use?

A: No. Lithium-ion batteries have no memory effect, so it’s the right way to charge and discharge normally.

Q: How do I properly charge my battery?

A: Please avoid exhausting the battery power and then recharging, because it will cause a lot of damage to your battery. Therefore, you have to charge it when the remaining power is nearly 10-20%. In addition, if your battery has not been used for a long time, please charge it once a month, keep the remaining power at about 40%, and then store it in a dry and cool environment.

Q: How to care for my JJY-MAK-BL4050F and extend its life?

A: 

1. A complete discharge would damage the life of the battery for power tools.

2. Please keep the power tools as dry and cool as possible.