Test/review of Conrad energy LiIon 9V 500mAh (Blue)

[size=+3]Conrad energy LiIon 9V 500mAh (Blue)[/size]



Official specifications:

• Chemistry: Lithium
• Rechargeable: Yes
• Voltage: 7.4V
• Rated Capacity: 500mAh
• Minimum Capacity: 450mAh
• Voltage at end of discharge: 6.0V
• Charging voltage: 8.4V
• Internal Impedance: <500mOhm at 1kHz
• Standard charge: CC/CV 8.4V 0.2C with 0.02C cut-off
• Fast charge: CC/CV 8.4V 0.5C with 0.02C cut-off
• Maximum continuous charge: 1C
• Standard discharge: 0.2C to 6.0V
• Fast discharge: 0.5C to 6.0V
• Maximum continuous discharge: 1C
• Operating temperature range: charge: 0°C ~ 45°C, discharge: -20°C ~ 60°C
• Storage temperature range: less than 3 months: -20°C ~ 40°C, less than 1 year: -20°C ~ 25°C
• Cycle life: 500 cycles to 70% using standard charge/discharge
• Size maximum: 48.5 x 26.5 x 17.5 mm

The German company Conrad have some 9V LiIon cell in their range of batteries, this is the high capacity version.
Overcharge protection on the A cell kicks in at 8,49 volt and over discharge protection at 5,67V
Overcharge protection on the B cell kicks in at 8,51 volt and over discharge protection at 5,56V












There is some difference in capacity between the two cells. Both cells handles load fine, even at 500mA, the capacity is also more than rated.











[size=+3]Conclusion[/size]


These batteries have more than double capacity compared to NiMH 9V batteries and are close to a alkaline battery at low load and this battery will maintain high capacity and voltage at high load.

In moderate to high load situations this looks like a good replacement for alkaline.



[size=+3]Notes and links[/size]

How is the test done and how to read the charts
Compare to other 9V batteries: Alkaline/NiMH/Lithium/other

Not suprised they are good at £13.99 each on the UK website.

Nice Review.

John.

Given that these obscure batteries are 6x more expensive than the ubiquitous 600mAh 9V 2S EBLs, and don't appear to offer any advantages, why would anyone consider buying them (and why would anyone consider reviewing them)?

Gauss163 said:

Given that these obscure batteries are 6x more expensive than the ubiquitous 600mAh 9V 2S EBLs, and don't appear to offer any advantages, why would anyone consider buying them (and why would anyone consider reviewing them)?

Click to expand...

How would you know that they are the same as EBL without reviews?
And please provide a link to a EBL review*, I would like to see their performance.

And I believe it is important to review both cheap and expensive batteries*, in my opinion it is the only way you are able to compare them.


* With reviews I do not mean opinions of people trying the batteries, but only real tests! And to compare batteries it is best to compare reviews from the same reviewer, there is a huge difference between the equipment used for testing batteries.

HKJ said:

How would you know that they are the same as EBL without reviews?

Click to expand...

As you surely know, I've mentioned many times that I've been using the EBLs for over a year, and they perform great in all my devices. So why would I (or anyone of sane mind) pay 6x the price for some obscure battery with no proven advantages?

It is beyond me why you chose to review this very obscure battery instead of the very popular EBL (by far the most widely sold Li-ion 9V on eBay).

Please don't support price-gouging companies by giving them free advertising.

Gauss163 said:

As you surely know, I've mentioned many times that I've been using the EBLs for over a year, and they perform great in all my devices. So why would I (or anyone of sane mind) pay 6x the price for some obscure battery with no proven advantages?

It is beyond me why you chose to review this very obscure battery instead of the very popular EBL (by far the most widely sold Li-ion 9V on eBay).

Please don't support price-gouging companies by giving them free advertising.

Click to expand...

I believe that I can use my money any way I want. If you want me to review a specific battery you can just send it to me and I will put it onto the queue (9V LiIon takes over a month to test).
Conrad may be an obscure company for you, but they are fairly large in German and some other countries. Somebody asked my nicely about looking on some Conrad batteries and living near Germany I believe it was a great idea and they where easy to buy (EBL is not easy to buy).

Chill out gentlemen :tsk: - Gauss... if you do not find this review of any value to you, then please stay out of it. You've had your say. Now drop it. Thank you.

EBL 9V might be OK and good value if you can find a good one, lots of complaints about the quality on Amazon.

https://www.amazon.co.uk/product-re...tBy=recent&filterByStar=critical&pageNumber=3

John.

EDIT:

What is really needed here is for someone to test the (few?) existing 2S 9V Li-ion chargers that are true CC/CV. Once we know which of them are good then we will know a good solution to recommend to the average consumer who knows little about Li-ion batteries.

at least you are getting a protected pack with the conrad.
the 1 ebl 9v li-ion i had was junk.
and when i autopsied it it had no protection.
easy to abuse it to an early grave....or worse!

snakebite said:

at least you are getting a protected pack with the conrad.
the 1 ebl 9v li-ion i had was junk.
and when i autopsied it it had no protection.
easy to abuse it to an early grave....or worse!

Click to expand...

That sounds bad, a 9V LiIon must never be discharged below about 5 volt and it needs a protection circuit to secure that.

Sounds like you should add a couple of EBL 9V to your test list Henrik so we can have ruling on the quality.

Gauss163 was saying the bad reviews on Amazon could be down to using poor quality included chargers.

John.

I have 6 EBL 9v lion batteries & they all cut out at 6 volts , when I charge them they all take between 580-600 mah.
I got them from feebay for £15 for 6.

TinderBox (UK) said:

Sounds like you should add a couple of EBL 9V to your test list Henrik so we can have ruling on the quality.

Click to expand...

The question is how do I get some?

Lots on eBay and Amazon, I just wish you did not have to buy a pack of 4x at £17.75 you normaly get 2x for your tests.

http://www.ebay.co.uk/itm/292131011081?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

John.

TinderBox (UK) said:

Lots on eBay and Amazon, I just wish you did not have to buy a pack of 4x at £17.75 you normaly get 2x for your tests.

http://www.ebay.co.uk/itm/292131011081?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

Click to expand...

But all says: "May not post to Denmark"
I also tried both English and German Amazon and it was the same problem.

I have got to say guys that the thread title speaks volumes. This thread is not about EBL's. It got off topic topic with Gauss163's postings

Bill

The EBL 9V li-ion have been reviewed on youtube, discharged and charged at 0.2C with 2 battery`s and they gave around 585mah each.

https://www.youtube.com/watch?v=9A06SPUF8i8

John.

EDIT: I found a review/test and a teardown photo of the EBL 9V li-ion

http://budgetlightforum.com/comment/1141691#comment-1141691




John.

Another great review, thanks.

I think reviewing whatever products are out there is important, at all price ranges. It's up to the individual to decide whether the money is worth it.

I'm now using Energizer 9V lithiums in these smoke detectors we have, as the alkalines don't last very long. This gives me another option.

HKJ said:

Conrad may be an obscure company for you, but they are fairly large in German and some other countries.
Somebody asked my nicely about looking on some Conrad batteries and living near Germany I believe it was a great idea and they where easy to buy (EBL is not easy to buy).

Click to expand...

Thanks HKJ! Great to see another review of 9V rechargable batteries from you
Btw, do you think these batteries are rechargable in the usual NiMh 9V chargers?


Conrad has a very good reputation in germany. And they sell only quality stuff. They have 25 stores in germany and 10 outside germany.
https://de.wikipedia.org/wiki/Conrad_Electronic

angerdan said:

Btw, do you think these batteries are rechargable in the usual NiMh 9V chargers?

Click to expand...

They are, but it is not really recommended. End of charge is controlled by the over charge circuit when you do that.