Milwaukee M18B5 M18 5.0Ah Red Lithium-Ion Battery
The Milwaukee M18 RedLithium XC5.0 battery pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than its competition. The lithium-ion battery pack has superior pack construction, electronics, and performance delivering more work per charge and more work over pack life than any battery on the market. The rechargeable battery delivers 5.0 amp-hours of runtime. Each battery pack is durably built for heavy duty use, runs cooler, and performs in climates below 0 deg. F/-18 deg. C. This protection routes water away from the electronics and out of the battery pack, extends battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in Redlink intelligence protects the battery from overloads, preventing power tool damage in heavy duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life. Switch to Milwaukees RedLithium XC5.0 battery pack to instantly upgrade the runtime and durability of Milwaukee M18 cordless tools.
The Milwaukee M18 RedLithium XC5.0 battery pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than its competition. The lithium-ion battery pack has superior pack construction, electronics, and performance delivering more work per charge and more work over pack life than any battery on the market. The rechargeable battery delivers 5.0 amp-hours of runtime. Each battery pack is durably built for heavy duty use, runs cooler, and performs in climates below 0 deg. F/-18 deg. C. This protection routes water away from the electronics and out of the battery pack, extends battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in Redlink intelligence protects the battery from overloads, preventing power tool damage in heavy duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life. Switch to Milwaukees RedLithium XC5.0 battery pack to instantly upgrade the runtime and durability of Milwaukee M18 cordless tools.
The Milwaukee M18 RedLithium XC5.0 battery pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than its competition. The lithium-ion battery pack has superior pack construction, electronics, and performance delivering more work per charge and more work over pack life than any battery on the market. The rechargeable battery delivers 5.0 amp-hours of runtime. Each battery pack is durably built for heavy duty use, runs cooler, and performs in climates below 0 deg. F/-18 deg. C. This protection routes water away from the electronics and out of the battery pack, extends battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in Redlink intelligence protects the battery from overloads, preventing power tool damage in heavy duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life. Switch to Milwaukees RedLithium XC5.0 battery pack to instantly upgrade the runtime and durability of Milwaukee M18 cordless tools.
The Milwaukee M18 RedLithium XC5.0 battery pack delivers up to 2.5X more runtime, 20% more power and 2X more recharges than its competition. The lithium-ion battery pack has superior pack construction, electronics, and performance delivering more work per charge and more work over pack life than any battery on the market. The rechargeable battery delivers 5.0 amp-hours of runtime. Each battery pack is durably built for heavy duty use, runs cooler, and performs in climates below 0 deg. F/-18 deg. C. This protection routes water away from the electronics and out of the battery pack, extends battery run-time and life by minimizing heat, and prevents pack failures from vibration or drops. Built-in Redlink intelligence protects the battery from overloads, preventing power tool damage in heavy duty situations, while the discharge protection prevents cell damage. An integrated temperature management system and individual cell monitoring help to maximize battery life. Switch to Milwaukees RedLithium XC5.0 battery pack to instantly upgrade the runtime and durability of Milwaukee M18 cordless tools.
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The lowest price for Milwaukee M18B5 M18 5.0Ah Red Lithium-Ion Battery right now is $50.22 at AliExpress.com - AliExpress-226247430, compared across 20 retailers.
The all-time low was $29.92 on 4 June 2026 — today's price is 68% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 9 June 2026.
Last updated at 09/06/2026 16:06:28
M18 B5 REDLITHIUM-ION Slide Battery Pack 18V 5.0Ah Li-ion, Black
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Milwaukee M18B5 M18 5.0Ah Red Lithium-Ion Battery
Free delivery
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Original Milwaukee M18 Fast Charging Lithium Battery 5.0Ah 6.0Ah Compatible M18B5 M18B6 Power Tool
Free delivery
Original Milwaukee battery M18,5.0AH,6.0Ah,Milwaukee charger,M18B6 M18B5 48-11-1860, 48-11-1850,
Delivery $17.88
Milwaukee M18B5 18V 5.0Ah Battery & Milwaukee 3-Layer Performance Face Mask *PACK OF 3* Select mask size
Authentic Milwaukee 18v 5.0ah Redlithium Battery, M18b5,genuine. 2y
Free delivery
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Authentic Milwaukee 18v 5.0ah Battery With Retail Box, Genuine, M18b5.
Free delivery
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Milwaukee 18v Battery 5ah Genuine Red Lithium M18b5 (brand New) Au
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Milwaukee M18 5.0ah Red Lithium-ion Battery - M18b5
Delivery $7.99
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Milwaukee 18v M18 Red Lithium Battery 5.0ah Genuine - M18b5
Free delivery
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originally posted on ffx.co.uk
Item came i then put new battery on charge. When used it only last 5 mins so its absolute rubbish. Went on live chat to get it sorted but chat ended all of sudden and then wouldn't work. So haven't been able to use it. Waste of time and money
originally posted on ebay.com
So far I can't say anything yet as i didn't use them enough to tell you or compare between the genuine one and theese batteries how they perform on serious job. From my opinion considering the fact about the difference in the price well there is no equivalent on that so honestly you get for what you paid. The batteries they come with some charge on them, so I've done with my wrench couple of vans all 4 wheels off and then put back. The battery came from 4 in total lanes it was with 3 when i start and finish same with 3 on the scale. It keep the charge definitely enough long. However I've noticed when i first put them on charge they indicated from original charger as charged just after 10 min as is full which I can't say really if that is good or no. Anyway the ... MoreSo far I can't say anything yet as i didn't use them enough to tell you or compare between the genuine one and theese batteries how they perform on serious job. From my opinion considering the fact about the difference in the price well there is no equivalent on that so honestly you get for what you paid. The batteries they come with some charge on them, so I've done with my wrench couple of vans all 4 wheels off and then put back. The battery came from 4 in total lanes it was with 3 when i start and finish same with 3 on the scale. It keep the charge definitely enough long. However I've noticed when i first put them on charge they indicated from original charger as charged just after 10 min as is full which I can't say really if that is good or no. Anyway the battery wasn't flat, but anyway so far I'm happy about,also there is no change on the power of your tool no matter what you using. I've tried them on a drill and M18 Milwaukee wrench. Very well build and good quality . Indicators the button is same as original one. So far no issues and definitely feel in confident and could order in future again. Thank you
originally posted on ebay.com
I cannot rate the product as you didnt have any and sent me 2.5AH instead. Granted you gave me an extra one for the inconvenience which is handy. It cost me more for one original battery a week earlier. All in all a great deal
| Product dimensions | 8 x 5 x 8 cm; 100 Grams |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Is discontinued by manufacturer | No |
| Voltage | 18 |
| Wattage | 90 watts |
M18 B5 REDLITHIUM-ION Slide Battery Pack 18V 5.0Ah Li-ion, Black
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Milwaukee M18B5 M18 5.0Ah Red Lithium-Ion Battery
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Original Milwaukee M18 Fast Charging Lithium Battery 5.0Ah 6.0Ah Compatible M18B5 M18B6 Power Tool
Free delivery
Original Milwaukee battery M18,5.0AH,6.0Ah,Milwaukee charger,M18B6 M18B5 48-11-1860, 48-11-1850,
Delivery $17.88
Milwaukee M18B5 18V 5.0Ah Battery & Milwaukee 3-Layer Performance Face Mask *PACK OF 3* Select mask size
Item came i then put new battery on charge. When used it only last 5 mins so its absolute rubbish. Went on live chat to get it sorted but chat ended all of sudden and then wouldn't work. So haven't been able to use it. Waste of time and money
So far I can't say anything yet as i didn't use them enough to tell you or compare between the genuine one and theese batteries how they perform on serious job. From my opinion considering the fact about the difference in the price well there is no equivalent on that so honestly you get for what you paid. The batteries they come with some charge on them, so I've done with my wrench couple of vans all 4 wheels off and then put back. The battery came from 4 in total lanes it was with 3 when i start and finish same with 3 on the scale. It keep the charge definitely enough long. However I've noticed when i first put them on charge they indicated from original charger as charged just after 10 min as is full which I can't say really if that is good or no. Anyway the ... MoreSo far I can't say anything yet as i didn't use them enough to tell you or compare between the genuine one and theese batteries how they perform on serious job. From my opinion considering the fact about the difference in the price well there is no equivalent on that so honestly you get for what you paid. The batteries they come with some charge on them, so I've done with my wrench couple of vans all 4 wheels off and then put back. The battery came from 4 in total lanes it was with 3 when i start and finish same with 3 on the scale. It keep the charge definitely enough long. However I've noticed when i first put them on charge they indicated from original charger as charged just after 10 min as is full which I can't say really if that is good or no. Anyway the battery wasn't flat, but anyway so far I'm happy about,also there is no change on the power of your tool no matter what you using. I've tried them on a drill and M18 Milwaukee wrench. Very well build and good quality . Indicators the button is same as original one. So far no issues and definitely feel in confident and could order in future again. Thank you
I cannot rate the product as you didnt have any and sent me 2.5AH instead. Granted you gave me an extra one for the inconvenience which is handy. It cost me more for one original battery a week earlier. All in all a great deal
Hard to tell if it actually is a 5ah battery but it works as it should and is a good price compared to the actual milwaukee brand as 2 of these batteries is cheaper than 1 milwaukee. Been using them for a week and they hold a good charge so far. Will wait to see if they stand the test of time but definitely seem good value for money and i am pleased with the purchase. Would recommend.
I Winn 3 is this batterys and they were like new. One has a little use. After 7 month they all went out. My suggestion. Buy the original even is they look like a truck ran over it. They will last very long. I bought some, very bad looking out side. Scratch, writing on it, full of dust and still good after 3 years of use.
Hi everyone if you want to waste your money buy this. I bought 3 of them within 1,5 month. 1st one melted down under load in my hand 2nd one I catch it earlier started to smoke. 3 one just doesn't hold any capacity I bought 6ah and my another 2ah last longer. If you want to waste you money buy it. Otherwise consider to buy genuine one it's worth the money.
Tested batteries using my fan . They last both lasted Battery 1- 5:12:31 hours Battery 2- 5:21:11 hours I'd say these batteries are more 3.5AH (For 18 quid each isn't bad at all) I have a genuine 5.0AH that lasts 7:30 + hours . (the genuine 1 is 3 years old) For the price you really can't complain although one battery rattles. They feel decent quality. Fit drill and fan better than original actually. NOT BAD
Not as expected. These batteries are the size of a "real" Milwaukee XC 5.0 AH battery. And slightly lighter. They do work - but do not last as long as expected especially compared to the "real" Milwaukee 8.0 I have. Unless one is okay with interior 5.0 batteries under the guise of an 8.0 battery ... I would say these are not advertised properly.
Charge indicator not working. Capacity significantly lower than a genuine 4ah. Poor quality, poor performance. Fast shipping.
We did not expect these batteries to be perfect but we did expect them to last longer than they did.The batteries did not last an hour before they were empty. On the second charge one battery is dead and won't charge at all. Save your money.
| Product dimensions | 8 x 5 x 8 cm; 100 Grams |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Is discontinued by manufacturer | No |
| Voltage | 18 |
| Wattage | 90 watts |