Duracell rechargeable 9V 170 mAh Battery - 1 Pack was £9.99 now £2.99 @ argos - HotUKDeals
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Duracell rechargeable 9V 170 mAh Battery - 1 Pack was £9.99 now £2.99 @ argos

£2.99 @ Argos
why keep buying when a recharge is all thats needed Read More
shadow1 Avatar
6y, 2m agoFound 6 years, 2 months ago
why keep buying when a recharge is all thats needed
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#1
Cheers shadow1 !

Just in time as needed to replace all Smoke Alarm batteries in the house !

Heat added.

Edited By: lampieuk on Feb 08, 2011 08:37
#2
£9.99 a crazy price, but £2.99 better.
#3
super, just reserved 6!
#4
lampieuk
Cheers shadow1 !Just in time as needed to replace all Smoke Alarm batteries in the house !Heat added.

All smoke alarms should be hard wired with a battery as a back up.
#5
my battery just taken out of the smoke alarm says 9v 160mAh - 8.4v

Is this the same thing?

My alarm is also hard wired and suddenly went bonkers in the middle of the night, no apparent reason.


Edited By: wantthatone on Feb 08, 2011 10:31
#6
Don't use rechargeable batteries in smoke alarms.

Don't be stupid or cheap.
#7
does anyone actually know if rechargeables are ok in smoke alarms?
surely if battery is low, it will start beeping?
shd post some of these to Lynn Scully!
#8
They say don't use rechargeables in smoke alarms.
#9
Thanks, perfect for guitar pedals.
#10
Thanks for this, but ony have smoke alarms with this size
2 Likes #11
Personal choice of course but advice on using rechargeable batteries in a smoke alarm:

http://en.wikipedia.org/wiki/Smoke_detector

"Common NiMH and NiCd rechargeable batteries have a high self-discharge rate, making them unsuitable for use in smoke detectors. This is true even though they may provide much more power than alkaline batteries if used soon after charging, such as in a portable stereo. Also, a problem with rechargeable batteries is a rapid voltage drop at the end of their useful charge. This is of concern in devices such as smoke detectors, since the battery may transition from "charged" to "dead" so quickly that the low-battery warning period from the detector is either so brief as to go unnoticed, or may not occur at all."
#12
Rupz
lampieuk
Cheers shadow1 !Just in time as needed to replace all Smoke Alarm batteries in the house !Heat added.


All smoke alarms should be hard wired with a battery as a back up.

not by any law...
as long as they are tested once a week, a battery is more then adequate, but must state DONT use a rechargable!!

Edited By: yubious on Feb 08, 2011 11:01
#13
Whatever the perils of using one, if the battery from your smoke alarm is flat and it's hanging around being 100% ineffective, surely better to have a fresh rechargeable battery in it than none!
#14
Sarah7
Whatever the perils of using one, if the battery from your smoke alarm is flat and it's hanging around being 100% ineffective, surely better to have a fresh rechargeable battery in it than none!

As mentioned in an above post, the rechargablle batteries discharge at a rate, where the home onwer will not know the battery requries a change, thus making it dangereous to both themselves and their family not to mention the neighbour who probably has proper batteries.

Re the ineffiective battery, it is not being inefficient because it has been warning you that the battery is low.
#15
wantthatone
My alarm is also hard wired and suddenly went bonkers in the middle of the night, no apparent reason.
It always happens in the middle of the night, because that's when it is coldest and if something is deteriorating very slowly, the minute change in the detection mechanism caused by change in temperature will eventually be enough to trigger it.

If it's an optical alarm, it may be because the smoke chamber is dirty. If you are competent enough to know what's what, get inside the casing and be aware of the electrical safety issues you can clean the chamber yourself. Look at the instructions - you may be able to tell what is causing the warning by comparing when the beep occurs to when the LED flashes.
#16
HOT!

At £3.99 they were a good buy but £2.99 - couple more for the Coinmaster!!
#17
Rupz
As mentioned in an above post, the rechargablle batteries discharge at a rate, where the home onwer will not know the battery requries a change, thus making it dangereous to both themselves and their family not to mention the neighbour who probably has proper batteries.


Think you missed my point, which was that a smoke detector with a completely dead battery in it (which is pretty common, e.g. when people haven't got around to buying a replacement yet) does no good at all! Anything (even temporary, using a rechargeable) is better than nothing!
#18
Sarah7
Rupz
As mentioned in an above post, the rechargablle batteries discharge at a rate, where the home onwer will not know the battery requries a change, thus making it dangereous to both themselves and their family not to mention the neighbour who probably has proper batteries.
Think you missed my point, which was that a smoke detector with a completely dead battery in it (which is pretty common, e.g. when people haven't got around to buying a replacement yet) does no good at all! Anything (even temporary, using a rechargeable) is better than nothing!

Agreed, but a temporary solution usualy ends up becoming permanent.
#19
Dusty
HOT!

At £3.99 they were a good buy but £2.99 - couple more for the Coinmaster!!
The what?
#20
Rupz
Sarah7
Rupz
As mentioned in an above post, the rechargablle batteries discharge at a rate, where the home onwer will not know the battery requries a change, thus making it dangereous to both themselves and their family not to mention the neighbour who probably has proper batteries.
Think you missed my point, which was that a smoke detector with a completely dead battery in it (which is pretty common, e.g. when people haven't got around to buying a replacement yet) does no good at all! Anything (even temporary, using a rechargeable) is better than nothing!


Agreed, but a temporary solution usualy ends up becoming permanent.


Also, why go to all the hassle of removing the rechargeable, finding the charger, setting it up to recharge, waiting for it to recharge, and then replacing it in the alarm, when it is much less work to simply swap in the regular long-life alkaline battery that you should have been using in the first place? ;)

btw, I'm not anti rechargeables; far from it. I just think it's a false economy to use the wrong tool for the wrong job, and mixing rechargeables and smoke alarms simply is a classic example.....

Anyway, back to the deal. Great price. Have some heat. I just need to work out where to use a rechargeable PP3 that needs a high discharge rate (i.e. isn't dependent on a long time between charges)?
#21
pibpob
Dusty
HOT!

At £3.99 they were a good buy but £2.99 - couple more for the Coinmaster!!
The what?


Ha, metal detector....
#22
NO rechargeable batteries are safe to use in smoke alarms, even the new 'Hybrio' cells that can last over 3 years with ultra low current draw are not safe.
The reason for this is that when rechargeables go flat the voltage drop is VERY sharp/steep indeed, practically ALL smoke alarms have low battery warning circuitry in them.
With this sharp voltage drop this EXTREMELY important indicator becomes very short lived and inefficient!
Don't take any chances, grab some decent cells for your smoke alarms!!



Edited By: Leftfield_2k2 on Feb 08, 2011 18:13
#23
A very good price, we use them for the microphone at the gym where I work. However, no stock near me, :-(
Voted hot though!

Edited By: daisydaisy on Feb 08, 2011 21:31
2 Likes #24
Must admit was not aware that using rechargable batteries in smoke detectors was not advised.

I have become used to saving money from this site, but learning this could potenitally have save me a lot more than just cash !!!

Thanks very much to all who have commented.

I am off out now to get some regular 9 volts :)
#25
lampieuk
Must admit was not aware that using rechargable batteries in smoke detectors was not advised.I have become used to saving money from this site, but learning this could potenitally have save me a lot more than just cash !!!Thanks very much to all who have commented.I am off out now to get some regular 9 volts :)

I have found this site is not just for great deals but also a place for the tech wizards and the knowledgable to shower the consumer with both facts and tips. This site is great!

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