24-12-2024, 11:25
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#1
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cf.mega poster
Join Date: Jun 2003
Location: Kairdiff-by-the-sea
Age: 69
Services: TVXL BBXL Superhub 2ac (wired) 1Tb Tivo
Posts: 10,171
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Rechargable batteries
Our DECT phone system is getting a bit old, but still works perfectly. But our daughter decided to buy a new one, BT7660.
I decided to read the instructions, and was puzzled to see this on one of the first pages:
"To keep the batteries in the best condition, leave the handset off the base for a few hours at a time.
Running the batteries right down at least once a week will help them last as long as possible."
Don't charge constantly like the one we already have (no battery changes in about 8 years)?
And running the batteries until flat before an 8-hour recharge, with the system down until at least some charge is in the batteries? And how would we manage to totally flatten the battery packs (2 x AAA)?
Has battery tech (NiMH) gone backwards?
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24-12-2024, 11:35
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#2
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Woke and proud !
Join Date: Jun 2004
Services: TV, Phone, BB, a wife
Posts: 9,781
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Re: Rechargable batteries
Quote:
Originally Posted by Taf
Our DECT phone system is getting a bit old, but still works perfectly. But our daughter decided to buy a new one, BT7660.
I decided to read the instructions, and was puzzled to see this on one of the first pages:
"To keep the batteries in the best condition, leave the handset off the base for a few hours at a time.
Running the batteries right down at least once a week will help them last as long as possible."
Don't charge constantly like the one we already have (no battery changes in about 8 years)?
And running the batteries until flat before an 8-hour recharge, with the system down until at least some charge is in the batteries? And how would we manage to totally flatten the battery packs (2 x AAA)?
Has battery tech (NiMH) gone backwards?
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Think thats the same for most rechargeable batteries. e.g. Laptops you're not advised to keep them plugged in all time and let the battery run down occasionally.
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24-12-2024, 12:05
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#3
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Just a Geek
Join Date: Jul 2015
Posts: 4,132
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Re: Rechargable batteries
I thought only old Nicads suffered the memory effect
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24-12-2024, 13:13
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#4
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XIV
Join Date: Dec 2009
Location: Crawley
Age: 35
Services: Three Unlimited
Posts: 14,773
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Re: Rechargable batteries
My OnePlus 9 Pro advises to charge to 80%, it has its own cut off and it also has night charge which lowers the charging rate so it doesn't over charge, sit on 100%. I of course have decided against the recommendations.
I had a home BT cordless phone. The batteries were cheap China clone quality, a nightmare.
Last edited by thenry; 24-12-2024 at 14:30.
Reason: Grammar correction
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24-12-2024, 17:22
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#5
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Dr Pepper Addict
Cable Forum Team
Join Date: Oct 2003
Location: Nottingham
Age: 62
Services: Aquiss FTTP (900M), Sky Q TV, Sky Mobile, Flextel SIP
Posts: 29,539
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Re: Rechargable batteries
Quote:
Originally Posted by Jaymoss
I thought only old Nicads suffered the memory effect
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That is correct, however, other types have other issues which can seem similar.
In fact, it appears that fully [deep] discharging rechargables can actually be bad for them.
Ref: https://en.wikipedia.org/wiki/Memory_effect
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