These tests below only note my personal opinion for the ESTIMATED ratings for the batteries I tested at the time I tested them. Any battery that is not a genuine Samsung, Sony, Murata, LG, Panasonic, Molicel, EVE, Lishen, BAK, or Sanyo can change at any time! This can be one of the hazards of using “rewrapped” or batteries from other manufacturers so carefully research any battery you are considering using before purchasing.
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.
Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.
If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.
Test Results
This is a fantastic performing cell. Like the Ampace JP40 and EVE 40PL this cell is “tabless” and that reduces its internal resistance and voltage sag. The 45D’s internal resistance (DC) essentially equals both those other cells.
At 40A down to 2.8V the BAK 45D delivered about 2% more energy (Wh) than the JP40 and ran for slightly longer. Though the JP40 ran at a slightly higher voltage for a while at the start. The 45D delivered about 6% more energy than the 40PL at 40A.
The 45D ran a few degrees hotter than the JP40 and 40PL but still a lot cooler than other power cells. It runs relatively cool for its 30A continuous rating and doesn’t sag too much at its 60A non-continuous rating. You must never let this cell get hotter than 80°C though!
40A pulsed+continuous and 100A continuous comparisons to other cells were done but the results are Patreon-only.
Some other results and info…
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
20700/21700 Ratings & Performance Table:
I want to work for the community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability, battery testing and news, and a say in what I test, then please consider becoming a patron and supporting my testing efforts: Get more from Battery Mooch on Patreon.
To see how other cells have tested check out this link: Links To All 21700, 26650, 18350, 18500 Battery Tests
Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. Never use them outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous discharge rating (CDR), never let it get colder than 0°C or hotter than 60°C, and keep the plastic wrap and top insulating ring in perfect condition. Never use a battery that is physically damaged in any way.
Testing batteries at their limits is dangerous and should never be attempted by anyone who has not thoroughly studied the dangers involved, understands the risks, has the proper equipment, and takes all appropriate safety precautions.
If the battery has only one current rating number, or if it only says "max", then I have to assume the battery is rated at that current level for any type of discharge, including continuous.
Test Results
This is a fantastic performing cell. Like the Ampace JP40 and EVE 40PL this cell is “tabless” and that reduces its internal resistance and voltage sag. The 45D’s internal resistance (DC) essentially equals both those other cells.
At 40A down to 2.8V the BAK 45D delivered about 2% more energy (Wh) than the JP40 and ran for slightly longer. Though the JP40 ran at a slightly higher voltage for a while at the start. The 45D delivered about 6% more energy than the 40PL at 40A.
The 45D ran a few degrees hotter than the JP40 and 40PL but still a lot cooler than other power cells. It runs relatively cool for its 30A continuous rating and doesn’t sag too much at its 60A non-continuous rating. You must never let this cell get hotter than 80°C though!
40A pulsed+continuous and 100A continuous comparisons to other cells were done but the results are Patreon-only.
Some other results and info…
- DC IR measured 5.6mOhms and 6.3mOhms for two cells. This is acceptable consistency.
- Capacities were 4502mAh and 4561mAh. This is not good consistency but is above this cell’s Typical 4500mAh and Rated 4400mAh capacity ratings.
- The standard charge rating is 2.2A and the max is 13.2A. I’m pretty sure that charging at or near that max rating will shorten the life of this cell. I recommend staying at 2A or lower for the longest cell life.
Continuous Current Discharge Graphs
Ratings and Performance Specs Graphic
18650 Ratings & Performance Table:
18650 Battery Ratings and Performance Table
You are responsible for your own safety! These batteries are designed, manufactured, and sold only for use in a battery pack with the proper protection circuitry and battery management system. They were not designed for vaping (electronic...
www.e-cigarette-forum.com
20700/21700 Ratings & Performance Table:
21700 Battery Ratings and Performance Table
You are responsible for your own safety! These batteries are designed, manufactured, and sold only for use in a battery pack with the proper protection circuitry and battery management system. They were not designed for vaping (electronic...
www.e-cigarette-forum.com
I want to work for the community full time! If you feel what I do is worth a couple dollars a month and you would like early access to battery availability, battery testing and news, and a say in what I test, then please consider becoming a patron and supporting my testing efforts: Get more from Battery Mooch on Patreon.
To see how other cells have tested check out this link: Links To All 21700, 26650, 18350, 18500 Battery Tests
Thank you for your kind words!
