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expiredRed_Liz | Staff posted Mar 20, 2026 06:57 PM
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expiredRed_Liz | Staff posted Mar 20, 2026 06:57 PM

Prime Members: 4-Pack HW 9 Volt 1400mAh Rechargeable Lithium Batteries

+ Free S&H

$13

$33

60% off
Amazon
30 Comments 11,223 Views
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Deal Details
TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon has for Prime Members: 4-Pack HW 9 Volt 1400mAh Rechargeable Lithium Batteries on sale for $19.99 - 35% with promo code 38PSK6NZ at checkout = $12.99. Shipping is free.

Thanks to Staff Member Red_Liz for sharing this deal.
  • Note: You must be logged in to clip coupons or apply promo codes. Coupons/Promo codes are typically single-use, may vary by account or may need to be re-applied in order to discount properly.
Details:
  • Capacity & Runtime: Upgraded 1400mAh rechargeable 9V lithium batteries; longer runtime than standard alkaline, NiMH, or regular lithium batteries; consistent, reliable power output
  • Charging: Built-in USB-C port; includes 4-in-1 charging cable; no separate charger required; LED indicator displays charging status
  • Safety Features: Multiple protections against overcharge, over-temperature, overload, and short-circuit
  • Eco & Cost Benefits: Up to 1000 recharge cycles; low self-discharge; constant voltage output; reduces waste and long-term costs
  • Compatibility: Suitable for smoke detectors, fire alarms, digital cameras, walkie-talkies, toys, game controllers, GPS units, clocks, security devices, and medical equipment

Editor's Notes

Written by SaltyOne | Staff

Original Post

Written by Red_Liz | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon has for Prime Members: 4-Pack HW 9 Volt 1400mAh Rechargeable Lithium Batteries on sale for $19.99 - 35% with promo code 38PSK6NZ at checkout = $12.99. Shipping is free.

Thanks to Staff Member Red_Liz for sharing this deal.
  • Note: You must be logged in to clip coupons or apply promo codes. Coupons/Promo codes are typically single-use, may vary by account or may need to be re-applied in order to discount properly.
Details:
  • Capacity & Runtime: Upgraded 1400mAh rechargeable 9V lithium batteries; longer runtime than standard alkaline, NiMH, or regular lithium batteries; consistent, reliable power output
  • Charging: Built-in USB-C port; includes 4-in-1 charging cable; no separate charger required; LED indicator displays charging status
  • Safety Features: Multiple protections against overcharge, over-temperature, overload, and short-circuit
  • Eco & Cost Benefits: Up to 1000 recharge cycles; low self-discharge; constant voltage output; reduces waste and long-term costs
  • Compatibility: Suitable for smoke detectors, fire alarms, digital cameras, walkie-talkies, toys, game controllers, GPS units, clocks, security devices, and medical equipment

Editor's Notes

Written by SaltyOne | Staff

Original Post

Written by Red_Liz | Staff

Community Voting

Deal Score
+34
Good Deal
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Top Comments

dantheman9703
2285 Posts
1068 Reputation
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

30 Comments

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Mar 20, 2026 07:55 PM
487 Posts
Joined Jan 2009
tooslickMar 20, 2026 07:55 PM
487 Posts
Code does work with S&S. Before tax about $12
Mar 20, 2026 08:23 PM
698 Posts
Joined Oct 2011
puffcorn221Mar 20, 2026 08:23 PM
698 Posts
Beep*
10
Mar 20, 2026 08:58 PM
99 Posts
Joined Nov 2021
BasecallMar 20, 2026 08:58 PM
99 Posts
Never even knew something like this existed. Nice post
Mar 20, 2026 09:57 PM
25 Posts
Joined Oct 2005
mcdz71Mar 20, 2026 09:57 PM
25 Posts
any use these in smoke alarms?
1
Mar 20, 2026 10:08 PM
2,285 Posts
Joined Apr 2006
dantheman9703Mar 20, 2026 10:08 PM
2,285 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.
1
Mar 20, 2026 10:24 PM
475 Posts
Joined Mar 2016
harley48Mar 20, 2026 10:24 PM
475 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
Mar 20, 2026 10:34 PM
549 Posts
Joined Jul 2019
Hubbs1
Pro
Mar 20, 2026 10:34 PM
549 Posts

Our community has rated this post as helpful. If you agree, why not thank Hubbs1

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.
2

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Pro
Mar 20, 2026 10:54 PM
793 Posts
Joined Feb 2015
bearstampede
Pro
Mar 20, 2026 10:54 PM
793 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.
2
Mar 20, 2026 11:14 PM
218 Posts
Joined Sep 2014
peekpokeMar 20, 2026 11:14 PM
218 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.
Mar 21, 2026 12:22 AM
1,433 Posts
Joined Jun 2022
ibuythingshereMar 21, 2026 12:22 AM
1,433 Posts
Quote from bearstampede :
Not to mention the inconvenience of dying in a fire.
just a small inconvenience
1
Mar 21, 2026 02:35 AM
315 Posts
Joined May 2017
jaxfatMar 21, 2026 02:35 AM
315 Posts
You can pass these out to your friends, you know which ones.
1
2
1
Mar 21, 2026 02:56 AM
117 Posts
Joined Aug 2018
ElGeFeMar 21, 2026 02:56 AM
117 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.
Mar 21, 2026 03:41 AM
1,414 Posts
Joined Aug 2005
desidude2000Mar 21, 2026 03:41 AM
1,414 Posts
Quote from ibuythingshere :
just a small inconvenience
Promise you, last one ever.
1
Mar 21, 2026 04:00 AM
15,531 Posts
Joined Jan 2010
Ride_The_SkyMar 21, 2026 04:00 AM
15,531 Posts
Quote from mcdz71 :
any use these in smoke alarms?
Can you even change batteries in new ones. They are now sealed and they pretty much expire in 10 years, really weird thst this is new trend, a lot of plastic waste, a lot of malfunction. I had to get warranty replacement and they are not cheap. Smoke and Carbon Monoxide detectors are expensive.. They said maybe I didn't clean it enough regularly that's why it malfunctioned... didn't clean it enough.. what?

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Mar 21, 2026 04:09 AM
2,434 Posts
Joined Nov 2018
IndigoWinter2667Mar 21, 2026 04:09 AM
2,434 Posts
Quote from Ride_The_Sky :
Can you even change batteries in new ones. They are now sealed and they pretty much expire in 10 years, really weird thst this is new trend, a lot of plastic waste, a lot of malfunction. I had to get warranty replacement and they are not cheap. Smoke and Carbon Monoxide detectors are expensive.. They said maybe I didn't clean it enough regularly that's why it malfunctioned... didn't clean it enough.. what?
They still sell/use "normal" ones. I have them in my house which was built recently.
People like the sealed ones because they dont have to change batteries, and if one goes off due to, say, cooking, then they dont network and trigger them all.

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