A question about charging 18v li-ion batteries such as typically found in drill drivers and portable tools etc.
Do these batteries fare better if kept fully charged between uses?
Thanks, Joe.
Bobdown said
04:53 PM Feb 7, 2019
Hi Joe,
I used to have a 18 v NiCad battery drill which used to work and charge better if it was run completely flat and fully charged.
Now I have the Ryobi Drill, 5ah li-ion batteries and they hold a charge forever, even after not being used for weeks, you can check the
status with button on the end and usually still get 4 - 5 lights of power indication. Still a full 12 v right to the end of power too.
Cheers Bob
Jaahn said
05:07 PM Feb 7, 2019
Hi
Generally speaking no. So I never charge mine till I need to use them heavily. Otherwise I just let them go with a check occasionally, for small jobs, or charge when they quit while using them. They are good things for sure my original ones are 5 years old now, and seem to work like new. I have 3 now which fit all the tools so running low during a job is no worries.
Jaahn
PS when I bought the original tools my son recommended I get two small batteries as they make the tool easier to handle being lighter. Worked well for me. The third is a big one for the grinder but the same fitting if I want to use it on the others. That may suit others on here too.
-- Edited by Jaahn on Thursday 7th of February 2019 05:17:48 PM
Yuglamron said
09:11 PM Feb 7, 2019
I just watched a YOUTUBE video about a guy who changed out his Lead Acid batteries in a Sail Boat. Eight batteries weighing about 35 Kilos wired to produce a 24 Volt supply.
The Lithium Ion batteries he said were around 15 to 20 kilos each
Stated that the lead acid would lose voltage after 50% of usable power was taken out. He also stated that they lost voltage if they weren't kept topped up by the Genny.
He also said that the Lithium Ion batteries would give more like 80% of their power before the voltage dropped. He also changed the electronics, including the charger to give better performance and charging for the new bank of batteries.
He had shown the battery monitor he used before the change and the new one which was the same dimensions as the old one and fitted the same cut out, but gave lots more info. State of Charge, State of charging, Amp/hrs used amps/hrs left.
To me apart from the cost it looked like a far lighter and more efficient use of the available power from Lithium ion compared to the lead acid bank.
He said that the modern Trickle feed /Float chargers for these sorts of batteries optimized their lifespan.
Mamil said
10:32 PM Feb 7, 2019
Farmhat wrote:
A question about charging 18v li-ion batteries such as typically found in drill drivers and portable tools etc.
Do these batteries fare better if kept fully charged between uses?
Thanks, Joe.
No, unlike lead acid, there is no benefit to longevity or capacity to be had by storing a Lithium Ion battery fully charged. In fact, quite the opposite, Lithium Ion batteries will 'age' faster if stored fully charged. The optimum storage conditions for a Lithium Ion battery is 50% SOC and less than 25 deg. C.
-- Edited by Mamil on Thursday 7th of February 2019 11:07:53 PM
Mamil said
10:39 PM Feb 7, 2019
Jaahn wrote:
PS when I bought the original tools my son recommended I get two small batteries as they make the tool easier to handle being lighter. Worked well for me. The third is a big one for the grinder but the same fitting if I want to use it on the others. That may suit others on here too.
Good advice! I use battery power tools quite a bit, and whilst the conventional wisdom seems to be to have as big a battery as possible for greater capacity, most times I won't run a battery anywhere near flat in one session (grinder and circular saw being notable exceptions) so I have a couple of smaller batteries that substantially reduce the weight of the power tool in the hand and therefore the fatigue factor.
Aus-Kiwi said
11:40 PM Feb 7, 2019
I have 48v battery for my lawn mower . They dont tmk have a memory. I charge battery the following night after its cooled down . Had it over two years . What I save on fuel . Its easy paid for itself !! Yes I have 12KW solar on house . So elect side is free . After two years it cuts 3 lawns in one charge .
T1 Terry said
03:15 PM Feb 8, 2019
All quality lithium power tool batteries have a BMS board as part of the battery pack. It stops the charge before cell goes high voltage and then effects a balancing process across the cells. This uses up the top few percent of the battery capacity so it does not remain at 100% SOC. The BMS then uses a trickle of the stored capacity to maintain its "watchful eye" Once it senses a dell going low voltage it will disconnect the output as well as the BMS so no further draining occurs.
Poor quality lithium power tool batteries, good luck with that, hope they don't explode while charging or while you are using them.
Please note, the Aldi lithium batteries are definitely in the "Quality battery" class, not the poor quality class, so price is not the factor
T1 Terry
T1 Terry said
03:22 PM Feb 8, 2019
Yuglamron wrote:
I just watched a YOUTUBE video about a guy who changed out his Lead Acid batteries in a Sail Boat. Eight batteries weighing about 35 Kilos wired to produce a 24 Volt supply.
The Lithium Ion batteries he said were around 15 to 20 kilos each
Stated that the lead acid would lose voltage after 50% of usable power was taken out. He also stated that they lost voltage if they weren't kept topped up by the Genny.
He also said that the Lithium Ion batteries would give more like 80% of their power before the voltage dropped. He also changed the electronics, including the charger to give better performance and charging for the new bank of batteries.
He had shown the battery monitor he used before the change and the new one which was the same dimensions as the old one and fitted the same cut out, but gave lots more info. State of Charge, State of charging, Amp/hrs used amps/hrs left.
To me apart from the cost it looked like a far lighter and more efficient use of the available power from Lithium ion compared to the lead acid bank.
He said that the modern Trickle feed /Float chargers for these sorts of batteries optimized their lifespan.
You risk going straight to hell without collecting your $200 for passing go :lol: Such blasphemy is not tolerated on this forum
A question about charging 18v li-ion batteries such as typically found in drill drivers and portable tools etc.
Do these batteries fare better if kept fully charged between uses?
Thanks, Joe.
Hi Joe,
I used to have a 18 v NiCad battery drill which used to work and charge better if it was run completely flat and fully charged.
Now I have the Ryobi Drill, 5ah li-ion batteries and they hold a charge forever, even after not being used for weeks, you can check the
status with button on the end and usually still get 4 - 5 lights of power indication. Still a full 12 v right to the end of power too.
Cheers Bob
Hi
Generally speaking no. So I never charge mine till I need to use them heavily. Otherwise I just let them go with a check occasionally, for small jobs, or charge when they quit while using them. They are good things for sure my original ones are 5 years old now, and seem to work like new. I have 3 now which fit all the tools so running low during a job is no worries.
Jaahn
PS when I bought the original tools my son recommended I get two small batteries as they make the tool easier to handle being lighter. Worked well for me. The third is a big one for the grinder but the same fitting if I want to use it on the others. That may suit others on here too.
-- Edited by Jaahn on Thursday 7th of February 2019 05:17:48 PM
I just watched a YOUTUBE video about a guy who changed out his Lead Acid batteries in a Sail Boat. Eight batteries weighing about 35 Kilos wired to produce a 24 Volt supply.
The Lithium Ion batteries he said were around 15 to 20 kilos each
Stated that the lead acid would lose voltage after 50% of usable power was taken out. He also stated that they lost voltage if they weren't kept topped up by the Genny.
He also said that the Lithium Ion batteries would give more like 80% of their power before the voltage dropped. He also changed the electronics, including the charger to give better performance and charging for the new bank of batteries.
He had shown the battery monitor he used before the change and the new one which was the same dimensions as the old one and fitted the same cut out, but gave lots more info. State of Charge, State of charging, Amp/hrs used amps/hrs left.
To me apart from the cost it looked like a far lighter and more efficient use of the available power from Lithium ion compared to the lead acid bank.
He said that the modern Trickle feed /Float chargers for these sorts of batteries optimized their lifespan.
No, unlike lead acid, there is no benefit to longevity or capacity to be had by storing a Lithium Ion battery fully charged. In fact, quite the opposite, Lithium Ion batteries will 'age' faster if stored fully charged. The optimum storage conditions for a Lithium Ion battery is 50% SOC and less than 25 deg. C.
-- Edited by Mamil on Thursday 7th of February 2019 11:07:53 PM
Good advice! I use battery power tools quite a bit, and whilst the conventional wisdom seems to be to have as big a battery as possible for greater capacity, most times I won't run a battery anywhere near flat in one session (grinder and circular saw being notable exceptions) so I have a couple of smaller batteries that substantially reduce the weight of the power tool in the hand and therefore the fatigue factor.
Poor quality lithium power tool batteries, good luck with that, hope they don't explode while charging or while you are using them.
Please note, the Aldi lithium batteries are definitely in the "Quality battery" class, not the poor quality class, so price is not the factor
T1 Terry
You risk going straight to hell without collecting your $200 for passing go :lol: Such blasphemy is not tolerated on this forum
T1 Terry
Thanks everyone for your replies.
Joe