The differences between Li-ion and NiMH 9V batteries

We explore the pros and cons between NiMH and Li-ion 9V batteries and chargers to help you decide on the right one for you.

Thanks for watching! Hope you'll find the video helpful. If you have questions, ask us in the comments and we’ll get back to you!

WHAT YOU'LL SEE:
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00:00 Intro
00:22 What is a 9V battery?
00:37 Similarities between NiMH and Li-ion batteries
01:05 Similarities between NiMH and Li-ion chargers
01:33 Capacity differences
02:35 Charging method differences
03:49 Voltage differences
05:15 Which one is right for you?
06:33 Outro

#tenergy #lithiumionbattery #9vbattery

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[irie]

Thanks, it took a lot of searching to get this explanation.

[jasonbrown]

love the video, i wish everyone putting up videos understood what they are talking about like you. once you understand the variables and data you can test against it, as another huge factor in batteries is that sellers/manufactures often greatly exaggerate the specs of their battery.

you must test each battery you get, at least until your trust your source of battery.

[HappySmilyGuy]

This was so helpful! And explains exactly the problem I'm having with my guitar! I might have to use non-rechargable :/

[killer]

Just the info I was looking for. I've just about given up on using rechargeables in place of alkaline because of the voltage difference and the low battery alerts.

[thetaffas]

Nice informative vid! Which one is more durable?

[winandd]

Beware that many Li-ion 9V batteries have only a single 3.7V cell and DC step-up converter inside to be able to output 9V !
These 9V batteries often are NOT suitable for audio applications because they can be a source of hum and hiss on the audio line.
That is why I used NiMh for the preamp in my active bass guitar. (cuts out lower than 5V, so 8.4V is fine)
I'm suprised to see that there are 9V Li-ion batteries with two cells of 3.7V in series, so I could be using those as well 👍

[Cyber-Crime-FBI]

I get 10v when checking with multimeter Duracell 9v when brand new some even test at 10.4v maybe my multimeter is out?

[hrbakery]

Also Low Self-Discharge Ni-MH batteries last years longer than lithium. However if you need more current in each cycle, then lithium is the right choice. For my low current applications, it's cheaper to buy NI-MH 9V. You think high capacity NI-MH batteries are best. Right? Wrong, high capacity NI-MH batteries loose mAh over time so buy low self discharge batteries for NI-MH chemistry type. If you need more mAh, go for the Lithiums. One more comment: Tenergy please make Lifepo4 9v rechargeable batteries.

[akafrawi]

thanks alot. but i have a que. please.. i have a wireless mic and want to get rechargeable battery 9 volts ... the final decision is which one..?

[OmnivorousOne]

Would the Ni-Mh or Li-Ion battery be more likely to loose some of its charge while in storage? Like if I charged it & put it away until needed wich one will loose more of its charge?

[Kewrock]

Being that Li-ion cells are so small. They're probably not even using conventional cells, probably polymer packs. They could easily make true 9v batteries.

[dianastoevelaar]

Thank you for a very professionally produced, informative video! 😊

However, I’m still not certain as to which battery would be best use for a TENS unit that I wear most of the day and night and need long running time for. I’m assuming that it’s not drawing a lot of current but I’m really not sure, as the disposable battery that came with the unit only lasted about 4 hours!

I am now using a codec, 9 V extra life alkaline battery, but we’d like to switch to rechargeables. otherwise I’ll go broke going through 9 V batteries daily, at this rate. 😆

Please advise as to which of the two batteries you illustrate would be best for me?

Thank you so much for your time and your knowledge.😊

[Pyro-]

Are there any 9volt rechargeable batteries that recharge up to the full 9.6volts ?

[pault]

Isn't "the most popular chemistry type" stated at the outset actually Zinc-carbon or manganese dioxide?

Perhaps the two types of chargers should be polarized with a peg coming out of the charger at different locations to interface with the correct battery, preventing full insertion of the wrong chemistry and damaging the battery.

Please be aware that these cells have significant voltage drop over time or at low temperature. Therefore, even though they work well at first installation, your devices may go into "battery alert" mode to warn you of a low battery when they actually have plenty of capacity. Primary batteries do not have this issue, so your success with using rechargeables in a smoke detector may vary.

It would be good to see some discharge curves for these products (voltage vs capacity).

[jndominica]

A Ni-MH battery has small round cells inside it. Because you can't pack round cells into a rectangular space well, they have empty space. Manufacturers may also include a fusible metal strip that melts if you short circuit the battery. Then you have to destructively open it to fix.

Lithium batteries may have a boost converter inside them to reach 9V from one cell. This one is a big no no in radio. It causes massive interference like all digital crap. A pouch cell can be packed better, but the boost converter takes room and must be insulated from the cell.

I can't reach 9V with lithium. It will either be 8.4-6.4 or 12.6-9.6. Ni-MH can be added with smaller increments.

[shanejohns]

There is a difference of about a whole 0.2 volt between the NiMH and Li-ion. 2x3.7 volts = 7.4 volts. While 6x1.2 volts = 7.2 volts. There's probably something in that clock that oscillates (quartz crystal or such) at a specific known frequency given a specific known voltage. And 7.2 and 7.4 volts probably produce a frequency of oscillation a bit slower than that of a true fully-charged 9v battery that is actually producing 9 actual volts.

[trevorw]

Interesting... can't find one reputable source comparing lithium-ion (rechargeable) vs lithium batteries. Also, I now have experience comparing published estimates of 9v and AA lithium batteries in smoke detectors (claims of 5 to 10 years) and know factually zero last 5 years. let alone 10 (five different type of detectors who made that claim). All are roughly 1 to 3 years. And who? Seriously who? Thought it was a good idea to chirp once a minute on a low battery. Just freaking beep every 5-10 seconds... blink a damn light. Idiots. Nothing is honestly portrayed or designed well these days. Going to try lithium-ion. Who knows. Can't trust data sheets at all. Worthless.

[charlschuck]

Hmm I had various issues w lithium 9V not many say : after months not even a year they puff inside this anyone that has used for years lithium lion pouches( which are inside the battery ) can ouff and start a small or big smoke and can even get to a heat level at charging and start some Hazards again not always will happen to everyone that doesn’t used them daily on higher drains, I would use in delicate gear, the old tech works better for safety . Is there a way to know when battery has puff to avoid this ? Not only your brand I’m talking overall other brands ( energizer also has this issue but with the old tech 🫢