There is a bit of electronics in each battery, so they do burn a bit of power just sitting around.
Canon recalls the Speedlite EL-5 due to faulty batteries
www.diyphotography.net
Hi David,
In my case, the power issues that I was experiencing were 100% attributed to something faulty within my EL-5 flash units, and not in my LP-EL batteries.
For those seeking to test their flashes, or communicate their experiences with Canon, below is the evaluation methodology that I applied to better understand the issue, because at the time, I did not know if the problem was due to:
a) my battery?
b) my flash?
c) or a combination of both my battery and my flash?
From this evaluation, I learned the fault that I was experiencing was most certainly being caused by something within the flash, and not within the battery.
Evaluation findings of my EL-5 Speedlite with its LP-EL battery
Table 1: Tombstone data
| Flash #1 (Faulty) | Battery #1 | Purchase Date | Vendor |
| Serial Numbers | 0200001431 | Date: 202210
07A1849 | July 28, 2023 | Vistek |
| Flash #2 (OK) | Battery #2 | | |
| Serial Numbers | 0400000717 | Date: 202211
16A4069 | September 21, 2023 | Canon Canada |
The data in Table 2 sought to see if the issue was with my flash.
- It clearly shows that one of my flashes (#1) was faulty, while the comparator (#2) was not (or, not at the time of data collection).
- It also shows that my faulty flash basically and completely drained my batteries within 32-hours — with zero flash use, and the flashes only being turned on to record battery information.
Table 2: EL-5 Test
Battery Capacity
(While Stored in Flash, Zero Flashes) | | | | |
Battery Information
“Remaining capacity” | (Faulty) Flash #1 | (Faulty) Flash #1 | (OK) Flash #2 | (OK) Flash #2 |
| Battery 1 | Battery 2 | Battery 1 | Battery 2 |
| Fully charged – 0 hour | 100% | 100% | 100% | 100% |
| 2-hours later | 92% | 93% | 96% | 96% |
| 4-hours later | 80% | 81% | 95% | 95% |
| 8-hours later | 69% | 68% | 95% | 95% |
| 12-hours later | 57% | 58% | 94% | 94% |
| 16-hours later | 45% | 48% | 94% | 94% |
| 20-hours later | 32% | 36% | 93% | 93% |
| 24-hours later | 20% | 25% | 93% | 93% |
| 28-hours later | 8% | 14% | 93% | 91% |
| 32-hours later | 0% | 3% | 93% | 91% |
| 36-hours later | - | 0% | 93% | 91% |
| 40-hours later | - | - | 93% | 91% |
| 44-hours later | - | - | 92% | 91% |
| 48-hours later | - | - | 91% | 90% |
The data in Table 3 sought to see if the issue was with my battery
This data shows at least two things:
- a) All of my LP-EL batteries kept their charge when not stored in the flash, and
- b) they all shared a near similar discharge rate when not inside my flashes.
Table 3: LP-EL Test
Battery Capacity
(While Not Stored in any Flash*) | | | | |
Battery Information
“Remaining capacity” | Battery #1 | Battery #1 | Battery #2 | Battery #2 |
| Flash #1 Info | Flash #2 Info | Flash #1 Info | Flash #2 Info |
| Fully charged – 0 hour | 100% | 100% | 100% | 100% |
| 12-hours later | 97% | 97% | 96% | 95% |
| 24-hours later | 95% | 95% | 95% | 95% |
| 36-hours later | 95% | 95% | 95% | 95% |
| 48-hours later | 93% | 93% | 93% | 93% |
* Battery placed in both flashes for gathering unique information, then removed.
Note 1:
My second flash (which I used as a control group) eventually became faulty a few months later, yet at the time of my first evaluation, it was working OK. So, whatever the issue was, in some cases it immediately impacts the flash unit, while in other cases it derives over time, or as some have claimed, not at all.
Note 2:
I regret not having shared this data sooner with the forum, as some life events impacted the ambition. Yet, I did share it with Canon, and with content perhaps it helped move the needle in establishing the recall notice. A big thanks to the people who also run and positively contribute to this forum — having a place to share and learn from others with similar gear can make a difference.