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Usate in sostituzione delle batterie 9 V, funzionano perfettamente. Anche la durata è ottima.

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emil82

Buon prodotto

Recensito in Italia il 21 aprile 2023

Confronto qualità prezzo penso siano le migliori, comprate due volte, mantengono la carica anche dopo qualche mese, se il prezzo fosse più accessibile avrei messo 5 stelle. Cmq sia consiglio.

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GioAQ

Tutto ok

Recensito in Italia il 14 gennaio 2024

Pessime Batterie Bonai 9V

Consegna puntuale, batterie cariche e funzionano egregiamente. Spero che durino a lungo!

Recensito in Italia il 4 aprile 2024

perfette

Recensito in Italia il 24 giugno 2023

Pessime batterie, messe in carica per la prima volta dopo 4 ore non raggiungono i 9V.... al massimo anche dopo una giornata di carica raggiungono 8V.
Le batterie hanno un peso pima... pesano meno della metà delle Amazon Basic 9V... quindi credo che al loro interno non ci sia nulla... sono vuote...!!!
Mi domando come si fa a mettere in commercio certa schifezza...
NON Compratele assolutamente soldi rubati.
Sconsigliatissime

Una persona l'ha trovato utile

contento,ma dimensioni non compatibili con certi vani,vedremo nel tempo.

pietro

Batterie 9 Volt

Recensito in Italia il 30 marzo 2024

Prodotto valido

Recensito in Italia il 31 marzo 2023

aperto il pacco ,rimango perplesso dal peso delle batterie,troppo leggere per darmi idea che siano funzionali,le carico una alla
volta con un caricabatterie professionale per batterie lipo /liion, dopo pochi minuti risultato cariche,verifico la tensione e trovo che è solo 8,2 volt. le ho prese da usare su un metal detector ,dove se le batterie arrivano a tale tensione, praticamente si spegne.parto dubbioso per un'uscita col metal detector,e con sorpresa vedo che mi dà ben 3 tacche di carica su 4 quando lo accendo.
dopo 2 ore di ricerca le tacche non sono calate.buon risultato viste le premesse,alla prossima uscita riverificherò il consumo.oggi ho provato di mettere la batteria nel mio pinpointer ma con sorpresa vedo che non entra ,gli spigoli della batteria sono troppo pronunciati ,ho dovuto fresare il vano con utensile multiuso elettrico, roba assurda!
aggiornamento:dopo diverse uscite con il metal detector per complessive 8 ore circa, l'indicatore di batteria indica 2 tacche residue,ottimo risultato!

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Traduci tutte le recensioni in Italiano

Le recensioni migliori da altri paesi

Lukas

Power!

Recensito in Germania il 26 marzo 2024

Benutze diese Batterien hauptsächlich in meinen Instrumenten und habe bisher keine besseren gefunden! Langlebigkeit wird hier großgeschrieben

PASCUAL

Perfectas

Recensito in Spagna il 6 marzo 2024

Lo esperado, funcionan perfectamente

orpon

Pure Ch*nesium!!

Recensito in Svezia in data 17 gennaio 2024

Inte värda kallas "batterier". Klarar en laddning!!

Ollinwen

Les gadgets refonctionnent

Recensito in Francia il 12 gennaio 2023

Enfin je peux faire fonctionner les gadgets de mon enfance sans être bloqué par le prix des piles.

Szabolcs

Great technology, but not trivial to charge. The USB version may be better for most users.

Recensito nel Regno Unito il 6 giugno 2020

Summary: Great battery, but you need a dedicated 9V lithium charger, or an adequate diy solution.
Good build quality, and it delivers the claimed capacity. I am really happy with these.
Please keep in mind, there is no built in charging circuit, unlike USB versions, but it has built in protection which should protect the battery from overcharging and deep discharging, and probably even short circuit. The built in protection does little to save the battery from charging mistakes, so you do need a dedicated charger, or know what you are doing. Or just go for the USB version of these.
Also, some devices may cut off before showing a low battery warning with this one. This depends on the device, and this is only a problem with the few devices that have their warning limit under 6V, the cut off limit of the protection circuit of this battery.

Details for professionals and battery nerds. Measurements on one battery:

532mAh full capacity into a 100ohm load, which is higher load than most 9V use cases. This means the nominal 600mAh will likely be achieved in most, "normal" use cases.

Voltage range: Fully charged: 8.4V, discharges to 6.065V, where protection kicks in and will show 0V. Te bulk of the charge will be delivered between 8V and 7V.

It arrived 7.75V out of the box, 390mAh when discharged without charging first.
This is good, as part charged is the recommended way to store rechargeable lithium ion batteries, so time spent in the retail change won't effect lifetime much.

These can put out a lot of power, much more than non-lithium versions.
I tested short, few seconds bursts over 1A. The protection kicked in above 3A, but I did not experiment with sustained high currents, nor did I test sorting the terminals, but I am reasonably confident it would survive just fine. I would imagine it will deliver up to 500mA sustained, at the cost of capacity efficiency.
The internal resistance is much lower than other 9V solutions I have at hand.

The battery has a fairly common protection solution. Probably an off the shelf, one chip solution.
The battery I tested cut off at 6.035V on normal discharge, and the protection also cut off when I tried drawing excess current when it was still fully charged.
When the protection kicks in, the battery will read 0V (well, the impedance is finite, so some current will leak out), and you need to start charging it to "wake it up". It doesn't seem to wake up after a timeout, I did wait a fair bit. Mine woke up by applying 6.15 for just a fraction of a second.
I did not experiment much with the overcharge protection, only to conclude that I would not rely on that alone to charge the battery. On a battery pack with fully implemented charging circuit you can just apply a sensible DC voltage and the battery would draw what it needs until fully charged, then cut off. I was secretly hoping this would be the case here to allow using proper dumb chargers, but I gave it 10% chance if.
Nope. This will cut off at some point, but way above the recommended 8.4V. On my battery I measured 8.585Vm and charging at as little as 0.25C (150mA) the battery still let the terminals rise over 8.4V (8,440V),
I cannot tell, not without taking the battery apart and measuring the voltage directly on the terminals of the cells, if the excess power that I pumped into the clearly fully charged battery was dissipated by the battery cells, or shunted by the protection circuit, but I would not rely on the circuit if I wanted to get a good lifetime out of the battery. So if you are DIY charging I recommend you limit the voltage to the recommended 8.4V. As for current 600mA (1C) is usually a safe charge rate, but you maw want to go lower to extend its life.

High current burst tests:
Battery: BONAI / GP ReCyko+/ Industrial by Duracell
Battery technology: li-ion / NiMH / Alkaline
Capacity: 600mAh / 150mAh / non-rechargeable
no load: 8.35V/8.58V/9.26V
100mA: 8.27V/8.27V/8.27V
200mA: 8.2V/8.05V/8.05V
500mA: 8.05V/7.36V/6.83V
1000mA: 7.74V/6.22V/4.7V
(roughly 2 second load bursts)
(repeated numbers are a spooky coincidence, as I tested these batteries in separate runs.)

I also tried high current charging to see if there is any sensible protection against over current while charging.
Nope. Nothing. I did pump in 3A for a few seconds and there was no sign of protection. The voltage on the terminals was 8.77V. Not sure how much of the 26W went into the cells and how much was dissipated, but doesn't matter really. No protection against high currents going in. Chances are it would have cut out at the same limit as it did during high current discharge (well over 3A) but I didn't want the battery to blow up in my face so I stopped there.

Anyway, in conclusion, Lithium in on a 9V package is a very welcome development if you ask me. I am a huge fan of rechargeable batteries, but the 9V form factor was missing a trick until this point. I use a lot of 9Vs so I moved to rechargeable early, but NiMH batteries have a few issues. Slow to charge them safely (you can charge them faster but you need a more sophisticated charger or a

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