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Izzy138 | Staff 2.9K Views
Sep 24, 2026 1:03 PM

4 Pack HW 9V Rechargeable Batteries 500+Cycles NiMH for TENS and EMS Units $9.07 + Free Shipping w/Prime

$9.07

$16

43% off
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Tiger Head Hi Watt Battery HK Co LTD via Amazon [amazon.com] has HW 9V Rechargeable Batteries 500+Cycles 4 Pack, NiMH for TENS & EMS Units for $9.07 w/code IE1TLPSL at checkout. Shipping is Free w/Prime or $35+
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Tiger Head Hi Watt Battery HK Co LTD via Amazon [amazon.com] has HW 9V Rechargeable Batteries 500+Cycles 4 Pack, NiMH for TENS & EMS Units for $9.07 w/code IE1TLPSL at checkout. Shipping is Free w/Prime or $35+

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Sep 24, 2026 6:46 PM
237 Comments
Joined Oct 2011
chunjuanSep 24, 2026 6:46 PM
237 Comments
200mAh
Sep 24, 2026 9:51 PM
485 Comments
Joined Jan 2004
francoisSep 24, 2026 9:51 PM
485 Comments

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They seem to actually be 9 volts, while the older rechargeable were 7.2V making them a bad option for smoke alarms.
For smoke alarm Lithium rechargeable or lithium disposable with 10 year live) may be prefered.
2
Sep 26, 2026 1:17 PM
510 Comments
Joined Mar 2016
harley48Sep 26, 2026 1:17 PM
510 Comments

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IMO, don't bother. The capacity is low (200mAh). The are made of of.....tiny.....little NiMh cells stacked in series. When they get that small they self discharge voltage/capacity pretty rapidly. They seem to always be dead/disappointing. They are 'ok' in a device that you charge and use on a routine basis.
Smoke alarm....not a chance.
1
Oct 3, 2026 5:12 PM
12.7K Comments
Joined Jan 2009
teaberryOct 3, 2026 5:12 PM
12.7K Comments
Does it come with a charger?

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