I have on of those Renpho EM-2016c massagers which uses this adapter to charge it @ 9V 1amp. Will I be ok using this 6V 1.5amp charger I found so I don't have to buy another charger? The fitting is perfect.
Can I Use 6V 1.5amp Charger Instead of 9V 1amp?
figarow on 25/04/2023 - 11:13
Comments
I would not recommend using a 9V 0.5A charger on something that wants to draw 9V 1A.
Thanks so much was about to risk it and thought ask an expert!! 1 massager saved :)
A lower voltage will probably just do nothing. It won't do damage.
And it might work, just taking longer to charge. I’d give it a go if the polarity matches.
It might work if a switch mode power supply, and at the same speed.
Eg my NUC came with a 19v supply, but works fine on 12v.But the massager has 7.2v battery, and I doubt has a boost circuit inside.
The voltage applied during charging should match the electrochemical potential of the battery chemistry. If the charger's voltage is too low, as in your example of charging a 2.7V battery with a 1V charger, the charging process might not occur at all or will be very inefficient. The reason is that the voltage applied is not enough to drive the chemical reactions necessary to store energy in the battery.
However, Charging circuits have:
Voltage regulator: This component ensures that the charger provides a constant voltage to the battery, according to the battery's chemistry and specific requirements.
Current regulator: This component controls the amount of current (amps) supplied to the battery during charging. This helps prevent the battery from overheating and reduces the risk of damage due to excessive current.
Which should (this word is doing a lot of heavy lifting here) protect it; and it's quite possible that a 6V 1.5A charger may be regulated into what is needed for the battery or perhaps the circuitry just says "computer says no".
Best case: it works
Probable case: it works or nothing happens
Worst case: battery explosionWill it work: maybe
Should you: NoIf it was a 9V 1.5A charger then that'll work
How could an under voltage charger possibly result in battery explosion?
Consistently charging a battery with an under-voltage charger can lead to a prolonged undercharging state. This could cause the battery to develop a high internal resistance and undergo chemical changes, such as dendrite formation. Dendrites are lithium or other metal deposits that can grow and create internal shorts, which may lead to excessive heat generation, thermal runaway, and ultimately, an explosion.
No problems. Lithium batteries are very safe. Just use the right charger.
Ask Ford.
https://www.theverge.com/2023/4/20/23691743/ford-f-150-light…
Because a petrol powered massager would be so much safer…
How about you ask Hyundai and Kia about their fire safety recalls
1kWh of battery is about 3.6MJ. An average EV battery is 70kWh, or about 252MJ of stored energy…
1 litre of petrol is about 33.5MJ. And average car fuel tank is about 60 litres… or about 2,010MJ of stored energy… Or about 8 times the energy density of batteries. More stored energy means bigger boom.
The best part of battery fires is when they catch fire, they dont leak or rupture and spread flammable liquid half way down the road and into surrounding areas and they dont tend to explode and take out half a block.
So much EV FUD bullshit.
Not sure why you took this as an attack on EVs and brought up petrol but…
1kWh of battery is about 3.6MJ. An average EV battery is 70kWh, or about 252MJ of stored energy…
Not quite true if you think about it the same way you think about the petrol. The 1kWh is deliverable by the battery as usable electricity but it contains materials that can fuel a fire possibly delivering substantially more than that.
No. The 6v part says no.
If you had a 9v 1.5a or a 9v 0.5a charger, these would work.