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popularRed_Liz | Staff posted Yesterday 06:57 PM
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popularRed_Liz | Staff posted Yesterday 06:57 PM

Prime Members: HW 4-Pack 9V 1400mAh USB-C Rechargeable Lithium Batteries w/ Cable $12.99 + Free Shipping $13

$13

$33

60% off
Amazon
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TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon [amazon.com] has for Prime Members: HW 4-Pack 9V 1400mAh USB-C Rechargeable Lithium Batteries w/ Cable on sale for $19.99 - 35% off w/ code 38PSK6NZ at checkout = $12.99. Shipping is free.

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TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon [amazon.com] has for Prime Members: HW 4-Pack 9V 1400mAh USB-C Rechargeable Lithium Batteries w/ Cable on sale for $19.99 - 35% off w/ code 38PSK6NZ at checkout = $12.99. Shipping is free.

Note: Promo codes are typically for one-time use and don't always apply seamlessly. If you run into this issue, refresh the page, re-enter the code, or revisit the cart page.

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Yesterday 07:55 PM
478 Posts
Joined Jan 2009
tooslickYesterday 07:55 PM
478 Posts
Code does work with S&S. Before tax about $12
Yesterday 08:23 PM
695 Posts
Joined Oct 2011
puffcorn221Yesterday 08:23 PM
695 Posts
Beep*
4
Yesterday 08:58 PM
98 Posts
Joined Nov 2021
BasecallYesterday 08:58 PM
98 Posts
Never even knew something like this existed. Nice post
Yesterday 09:57 PM
23 Posts
Joined Oct 2005
mcdz71Yesterday 09:57 PM
23 Posts
any use these in smoke alarms?
1
Pro
Yesterday 10:08 PM
2,284 Posts
Joined Apr 2006
dantheman9703
Pro
Yesterday 10:08 PM
2,284 Posts
Quote from mcdz71 :
any use these in smoke alarms?
Definitely don't recommend with low quality lithium cells. There's always chance they randomly drain too quickly to output the amps required for the alarm to recognize a low battery to warn you. Better off with dollar store 2 for $1.25
Last edited by dantheman9703 March 20, 2026 at 03:26 PM.
Yesterday 10:24 PM
471 Posts
Joined Mar 2016
harley48Yesterday 10:24 PM
471 Posts
These keep coming up. They appear by some test reports to be ~400mAh. Not 1400 and not great by WAY better than NiMh 9v.
I use mine in smoke alarms and digital volt meters, but mine are (tested) 500-600, AND I change them out every 6 months.
Pro
Yesterday 10:34 PM
537 Posts
Joined Jul 2019
Hubbs1
Pro
Yesterday 10:34 PM
537 Posts
Quote from mcdz71 :
any use these in smoke alarms?
I worked at a smoke alarm company for many years and have seen a lot of tragedy from fires. I wouldn't recommend straying from a standard name brand battery. They are pricy up front but if you're going to stay in your place for a while they make sealed units with 10 year batteries (smoke alarm's have a 10 year life) so once a decade you replace the entire alarm but avoid the cost and hassle of batteries.
1

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Pro
Yesterday 10:54 PM
767 Posts
Joined Feb 2015
bearstampede
Pro
Yesterday 10:54 PM
767 Posts
Quote from Hubbs1 :
I worked at a smoke alarm company for many years and have seen a lot of tragedy from fires. I wouldn't recommend straying from a standard name brand battery. They are pricy up front but if you're going to stay in your place for a while they make sealed units with 10 year batteries (smoke alarm's have a 10 year life) so once a decade you replace the entire alarm but avoid the cost and hassle of batteries.
Not to mention the inconvenience of dying in a fire.
Yesterday 11:14 PM
208 Posts
Joined Sep 2014
peekpokeYesterday 11:14 PM
208 Posts
I use these as battery backup in some LED clocks. They lose their time each time we get a blackout, huge pain. Also put one into a gas detector alarm that is normally AC powered but complains with beeps if the 9V gets weak.
Now with another 4 I will have spares that stay charged.
Today 12:22 AM
1,424 Posts
Joined Jun 2022
ibuythingshereToday 12:22 AM
1,424 Posts
Quote from bearstampede :
Not to mention the inconvenience of dying in a fire.
just a small inconvenience
Today 02:35 AM
298 Posts
Joined May 2017
jaxfatToday 02:35 AM
298 Posts
You can pass these out to your friends, you know which ones.
Today 02:56 AM
114 Posts
Joined Aug 2018
ElGeFeToday 02:56 AM
114 Posts
I was just thinking of picking up some rechargeable 9V batteries for my ThermoWorks TimeStack timer. It's not a critical device, so no harm if they don't last.

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