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2-Pack HW 9V NiMH 200mAh Rechargeable Batteries
$4.50
$12
62% off
w/ Subscribe & Saveat Amazon
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w/ Subscribe & Saveat AmazonDeal Details
TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon has 2-Pack HW 9V NiMH 200mAh Rechargeable Batteries for $9.99 - $1.00 coupon on product page - $4.50 w/ promo code OTO49AZM applied at checkout - $0.50 w/ Subscribe & Save = $4.49. Shipping is free w/ Prime or on $35+ orders.
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to an extra 15% savings when you have 5 or more items in your current monthly subscription.
Thanks to Staff Member DesertGardener for finding this deal.
Features:
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to an extra 15% savings when you have 5 or more items in your current monthly subscription.
Thanks to Staff Member DesertGardener for finding this deal.
Features:
- Convenient 2-Pack Size – Includes two HW rechargeable 9V NiMH batteries (200mAh/1800mWh), ideal for customers needing a compact set for essential devices or as spare power.
- Fast Recharging with Safety Protection – Designed for rapid charging when used with a compatible charger (not included). Built-in protection guards against overcharge, over-discharge, overheating, and short circuits.
- Cost-Saving & Eco-Friendly – Each battery can be recharged up to 1000 times, reducing e-waste and cutting costs compared to disposable 9V batteries.
- Wide Device Compatibility – Suitable for smoke detectors, wireless microphones, guitar pedals, multimeters, RC toys, and other 9V-powered devices. Perfect for both home and professional gear.
- Pre-Charged & Low Self-Discharge – Arrives pre-charged and ready to use. Advanced low self-discharge technology maintains usable power for months in storage.
Editor's Notes
Written by powerfuldoppler | Staff- About this deal:
- Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
- About this store:
- Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
- If you're not a student, there's also a free 1-Month Amazon Prime trial available.
Community Notes
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TIGER HEAD HI WATT BATTERY HK CO LTD via Amazon has 2-Pack HW 9V NiMH 200mAh Rechargeable Batteries for $9.99 - $1.00 coupon on product page - $4.50 w/ promo code OTO49AZM applied at checkout - $0.50 w/ Subscribe & Save = $4.49. Shipping is free w/ Prime or on $35+ orders.
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to an extra 15% savings when you have 5 or more items in your current monthly subscription.
Thanks to Staff Member DesertGardener for finding this deal.
Features:
Note: You must be logged into your account. Coupons are typically one use per account. You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to an extra 15% savings when you have 5 or more items in your current monthly subscription.
Thanks to Staff Member DesertGardener for finding this deal.
Features:
- Convenient 2-Pack Size – Includes two HW rechargeable 9V NiMH batteries (200mAh/1800mWh), ideal for customers needing a compact set for essential devices or as spare power.
- Fast Recharging with Safety Protection – Designed for rapid charging when used with a compatible charger (not included). Built-in protection guards against overcharge, over-discharge, overheating, and short circuits.
- Cost-Saving & Eco-Friendly – Each battery can be recharged up to 1000 times, reducing e-waste and cutting costs compared to disposable 9V batteries.
- Wide Device Compatibility – Suitable for smoke detectors, wireless microphones, guitar pedals, multimeters, RC toys, and other 9V-powered devices. Perfect for both home and professional gear.
- Pre-Charged & Low Self-Discharge – Arrives pre-charged and ready to use. Advanced low self-discharge technology maintains usable power for months in storage.
Editor's Notes
Written by powerfuldoppler | Staff- About this deal:
- Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
- About this store:
- Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
- If you're not a student, there's also a free 1-Month Amazon Prime trial available.
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Community Reviews
These 9V rechargeable batteries are best suited to low drain devices like smoke detectors, TENS units, voltmeters, sprinkler controllers, and other occasional use gear. The low price makes repeated recharging cheaper than buying alkaline 9V batteries, and the lithium style packs are described as holding voltage better than NiMH. The main concerns are capacity and longevity, since the 200mAh rating is viewed as very small and some expect short runtime. Charging compatibility also needs checking, though standard 9V chargers may work with the built in cutoff.
Common Questions (4)
They can work in low-drain devices like smoke detectors, voltmeters, TENS units, and sprinkler-controller backups, but the 200mAh NiMH capacity is small and self-discharge is a concern. They are better suited to occasional-use gear than anything that needs long runtime.
The 200mAh rating is only a bit more than one-third of typical name-brand capacity, so runtime is limited. For many uses, lithium 9V packs hold voltage longer and can last months, while these NiMH cells may not last long enough for frequent or high-demand use.
It is considered very low for a 9V rechargeable and is roughly a third of common name-brand capacity. That makes it usable for some applications, but not ideal if you want a non-puny 9V with long runtime.
Many standard 9V chargers can charge the newer 8.4V lithium-style packs, with the built-in electronics acting as charge limiters. The first charge should be monitored closely in a fireproof spot because charger compatibility and heat can vary.
AI-generated summary based on comments from the community. Updated ago
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37 Comments
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I have some older EBL Li-ion and it's exactly like you said. 2 pouches x 4.2V when freshly charged, goes to 2x3.6V in weeks or months at most. Not enough for smoke detectors. Capacity around 400-600mAh.
However I think the newer ones sold on Amazon such as the HW 9V Li-ion rechargeable have a single larger pouch and voltage booster/regulator. That's why people are measuring 9V constant. It will keep 9V for most of discharge cycle then drop to something like 1V suddenly. Similar to AA Li-ion that keep 1.5V constant.
Petty greed can erode away honesty.
Petty greed can erode away honesty.
"Wide Compatibility: EBL 9 volt batteries provide stable voltage until fully drained, ideal for smoke alarms, microphones, toys, and medical devices. Standard 6F22 cell size fits all 9V gadgets."
https://www.eblofficial
"Wide Compatibility: EBL 9 volt batteries provide stable voltage until fully drained, ideal for smoke alarms, microphones, toys, and medical devices. Standard 6F22 cell size fits all 9V gadgets."
HJK, as he was called, is a marvel and did HUGE volume of EXCELLENT work that was published in BudgetLightForum.and Candlelight forum.
Use https://lygte-info.dk/ and you can get to his main index. It's massive. Got a majority of my information from him and BudgetLightForum. Incredible resource.
Unfortunately I think the pace caught up with him. He published for free and would take no gifts to keep clear of compromises. He didn't pull punches. He quit a few years ago. With the pace of electronic development some of his material is dated now.
HJK, as he was called, is a marvel and did HUGE volume of EXCELLENT work that was published in BudgetLightForum.and Candlelight forum.
Use https://lygte-info.dk/ and you can get to his main index. It's massive. Got a majority of my information from him and BudgetLightForum. Incredible resource.
Unfortunately I think the pace caught up with him. He published for free and would take no gifts to keep clear of compromises. He didn't pull punches. He quit a few years ago. With the pace of electronic development some of his material is dated now.
The Zntr seems similar to the new EBL. The only conclusion i can draw (hope at least) from the EBL page for that new battery is that somebody developed a high efficiency and cheap enough buck converter that has very small parasitic drain and can be used in very low discharge devices such as smoke detectors.
The Zntr seems similar to the new EBL. The only conclusion i can draw (hope at least) from the EBL page for that new battery is that somebody developed a high efficiency and cheap enough buck converter that has very small parasitic drain and can be used in very low discharge devices such as smoke detectors.
.....SOME....of the 1.5v AA can do LSD like an Eneloop, but most have 40-80% loss in a year, and the really poor ones it's 100%. That's worse than NiCads.
I've been pleased with the iPowerUS. I got them from an Aquarium volunteer job as routine maintenence swaps from their in-house communication devices. Used hard, already had years on them, and continue to work great, though after 10 years showing some age. Lets a person know what a GOOD lithium product can do.
The EBL, (AAA, AA, C, D, 9v-I bought a BIG package) I have are merely OK. Their internal resistance goes up rapidly and their ability to terminate correctly in any charger I have starts to deteriorate, The charger that came with it is a shelf queen. I rarely use it, to charge the 9v.
I think the EBL marketing team is excellent, engineering-not so much.
If I weren't flush with iPowerUS I might buy some to try out, but I got to put myself on a 'battery diet'.
.....SOME....of the 1.5v AA can do LSD like an Eneloop, but most have 40-80% loss in a year, and the really poor ones it's 100%. That's worse than NiCads.
I've been pleased with the iPowerUS. I got them from an Aquarium volunteer job as routine maintenence swaps from their in-house communication devices. Used hard, already had years on them, and continue to work great, though after 10 years showing some age. Lets a person know what a GOOD lithium product can do.
The EBL, (AAA, AA, C, D, 9v-I bought a BIG package) I have are merely OK. Their internal resistance goes up rapidly and their ability to terminate correctly in any charger I have starts to deteriorate, The charger that came with it is a shelf queen. I rarely use it, to charge the 9v.
I think the EBL marketing team is excellent, engineering-not so much.
The Hixon and Tenavolts have a few years on them. They are 1.5V Li-ion AA and AAA. Out of about 25 I have, one failed.
The EBLs I have are 9V Li-ion, but fairly new. About 10, and working well so far. They have a small dedicated pentagon shaped charger with 5 bays. Works well, bright lights when charging that get dimmer and eventually off as the batteries get charged.
I have the large 4 bay EBL universal charger that can charge D size and also 9V. The 9V charge doesn't have any intelligence in it not even a timer, you have to remove batteries after 3 hours or so. For 9V Ni-Mh I use a smart universal Ansmann charger with 2 bays for 9V and a Tenergy 4 bay charger, TN-136.
Mostly use an Opus BT-C3100 to charge NiMh and especially Li-ion 18650, 21700 etc., an older Powerex charger for NiMh and several Nitecores. Also use the small Panasonic 4 bay charger for AA and AAA, works well, but sensitive/won't charge older batteries
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