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I wonder if it would be sensible to use rechargeable batteries is the professional audio world? Currently, we use normal AA batteries in wireless microphones, and standard practice is new ones at least every show, and often during the interval as well*. We went through about 400 for one musical recently with five performances! I'm not sure what effect the lower voltage would have though...
*Personally I think this is a bit excessive, but I might change my mind if something runs out of power during the middle of a show!
7DayShop were based in the Channel Islands, and were able to supply goods without charging VAT. This loophole was closed many years ago.
I've used some of their own brand (early) 2500mAh NiMh cells but they didn't last so long. They don't seem to listed on their website any more.
I wonder if it would be sensible to use rechargeable batteries is the professional audio world? Currently, we use normal AA batteries in wireless microphones, and standard practice is new ones at least every show, and often during the interval as well*. We went through about 400 for one musical recently with five performances! I'm not sure what effect the lower voltage would have though...
*Personally I think this is a bit excessive, but I might change my mind if something runs out of power during the middle of a show!
I wonder if it would be sensible to use rechargeable batteries is the professional audio world? Currently, we use normal AA batteries in wireless microphones, and standard practice is new ones at least every show, and often during the interval as well*. We went through about 400 for one musical recently with five performances! I'm not sure what effect the lower voltage would have though...
*Personally I think this is a bit excessive, but I might change my mind if something runs out of power during the middle of a show!
I've used NiMH rechargeables in Sennheiser EW G2, G3, G4 and XS2 (all analogue) handhelds and bodypacks for some years. They seem to last well - at least in our use-case, which admittedly isn't four hours of full-on musical, and for the less-used sets it is sometimes more convenient to fit Alkaline. I'd expect to get a working day's use out of a set - that is four or five hours with at least one bar still showing at the end of the day, which is comparable to Alkaline in my experience. The thing which can make some nervous is that it goes from three bars (out of three) to two bars after only an hour or so of use, but then it sticks at two bars for ages and range doesn't seem affected, though in our case distance from performer to receive aerial is rarely more than 20 or 25m and more often under 15m.
Sennheiser's digital kit (definitely out of our price range) has Lithium rechargeable batteries as standard I think. Even if you would want to play safe and swap batteries at the interval (so need two full sets), it will still work out cheaper long-term I'd have thought. Key is to have a good system of battery management - decent chargers and decent storage for "just charged", "charged within the last couple of weeks" and "need charging".
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7DayShop were based in the Channel Islands, and were able to supply goods without charging VAT. This loophole was closed many years ago.
I've used some of their own brand (early) 2500mAh NiMh cells but they didn't last so long. They don't seem to listed on their website any more.
Thanks for that info. It's a shame as they were good for a while, but at the moment I'm favouring GP cells from CPC which seem to be reasonable value for money. Before LSD came along I did buy some of the 7DS "normal" NiMH batteries. Didn't find them any worse (or realistically any better) than other brands, and I do still have a few still in use. It's the Low Self-Discharge technology which has been the game-changer for me.
The thing which can make some nervous is that it goes from three bars (out of three) to two bars after only an hour or so of use, but then it sticks at two bars for ages and range doesn't seem affected, though in our case distance from performer to receive aerial is rarely more than 20 or 25m and more often under 15m.
I'm not 100% sure about NiMh but LiFePO4 batteries as used in solar storage have a voltage/charge curve that drops off a lot from 100% to ~95% and then is pretty much flat down to around 20% and then it drops off a cliff. Sounds like NiMh is similar.
I wonder if it would be sensible to use rechargeable batteries is the professional audio world? Currently, we use normal AA batteries in wireless microphones, and standard practice is new ones at least every show, and often during the interval as well*. We went through about 400 for one musical recently with five performances! I'm not sure what effect the lower voltage would have though...
*Personally I think this is a bit excessive, but I might change my mind if something runs out of power during the middle of a show!
Can be sensible, just get a good charging regime.
Most wireless sytems have been happy with rechargeables for years, my 80's TOA system that uses 3xAAA is fine with Ni-Mh and most of my other systems have been happy as well, it was only a Db Technologies 900 transmitter that was not happy with a 9V/PP3 rechargeables and I wouldn't be suprised if some other 9V systems are also a bit picky.
Some systems even have an option for rechargeables that can be rechaged whilst still in the transmitter.
As for worring about runnjng out of power, the 80's TOA systems (handheld is a WM-230) get 30hrs on 3xAAA alkalines and when the low batt light comes on you still have ~5hrs!
Can be sensible, just get a good charging regime.
Most wireless sytems have been happy with rechargeables for years, my 80's TOA system that uses 3xAAA is fine with Ni-Mh and most of my other systems have been happy as well, it was only a Db Technologies 900 transmitter that was not happy with a 9V/PP3 rechargeables and I wouldn't be suprised if some other 9V systems are also a bit picky.
Some systems even have an option for rechargeables that can be rechaged whilst still in the transmitter.
As for worring about runnjng out of power, the 80's TOA systems (handheld is a WM-230) get 30hrs on 3xAAA alkalines and when the low batt light comes on you still have ~5hrs!
Regarding PP3 I learnt the error of my ways investing in them during the period 1999-2010approx. I kept coming across uses that were no good. I also noticed my PP3s were dropping voltage - presumably as one or more of the 7 or 8 x 1.2V cells dropped dead. That failure to achieve 9V was possibly due to lack of use eventually. I certainly do not consider the PP3s in the same light as AAA, AA, C and D cells. None of my chargers are intelligent on PP3s.
Regarding PP3 I learnt the error of my ways investing in them during the period 1999-2010approx. I kept coming across uses that were no good. I also noticed my PP3s were dropping voltage - presumably as one or more of the 7 or 8 x 1.2V cells dropped dead. That failure to achieve 9V was possibly due to lack of use eventually. I certainly do not consider the PP3s in the same light as AAA, AA, C and D cells. None of my chargers are intelligent on PP3s.
I think the person you were quoting was referring to replaceable batteries vs not just proprietary li-ion batteries but often now not even replaceable ones either which I agree with the person's comment since it's very handy swapping over a pair of AA's vs having to charge the device especially something like a game controller.
I think the person you were quoting was referring to replaceable batteries vs not just proprietary li-ion batteries but often now not even replaceable ones either which I agree with the person's comment since it's very handy swapping over a pair of AA's vs having to charge the device especially something like a game controller.
Having had to scrap two otherwise-satisfactory hair/beard trimmers when the built-in non-replaceable battery died, I've now bought a (cheaper) model which takes two AA cells. It will always be used with rechargeables, but at least I can replace them if and when necessary. Plus if the batteries run out of charge halfway through a trim, I can always bung in a spare pair (or even alkalines) to finish the job off.
Having had to scrap two otherwise-satisfactory hair/beard trimmers when the built-in non-replaceable battery died, I've now bought a (cheaper) model which takes two AA cells.
Having had to scrap two otherwise-satisfactory hair/beard trimmers when the built-in non-replaceable battery died, I've now bought a (cheaper) model which takes two AA cells. It will always be used with rechargeables, but at least I can replace them if and when necessary. Plus if the batteries run out of charge halfway through a trim, I can always bung in a spare pair (or even alkalines) to finish the job off.
Yes. I prefer a device where the batteries can be removed for charging. Only then can a spare set be relevant. Ideally these are a common as muck size so Alkalines can be bought if desperate.
The above used to be true of my mobile phones but nowadays they are more or less sealed in. So its a USB power bank which means another hysteresis curve (power loss) to go through.
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