Question 1

Can you leave them plugged in and seated in the charger after they are charged?

Accepted Answer

The charger LED go from red to green when fully charged. I have left them on for a few hours extra and detected no extra heat. So I think the charger or batteries are smart enough to stop charging. Lithium has a low self discharge so I don't see any benefit to leaving them plugged in after they're fully charged.

Question 2

What size are these batteries? Are they the same size as standard alkaline batteries?

Accepted Answer

Loring Chien
, Electrical Engineer for 45 years & IEEE Sr. Life member
Answered 2 years ago · Author has 39.4K answers and 75M answer views

I presume you are asking about Alkaline chemistry batteries.

Their capacity is maybe on the order of 400 mAh.

Actual capacity depends on the current value and the temperature. At higher current values the capacity is always smaller.

And of course it varies some by manufacturer.

this manufacturer rates these as 850mAh ......?

Question 3

How long does it take to charge the batteries? Mine have been charging for 12 hours and still flashing red lights.

Accepted Answer

The 9V batteries come with an initial charge (although how full I do not know).  I remember placing them in the charger overnight, so I can't speak to when exactly they reached a full charge?

I would recommend that you unseat the batteries and then slowly re-seat them.  I found that it worked best if I did so in a rocking motion: one edge in place and then rock forward until firmly seated.  Perhaps they're not fully connected?

Otherwise, contact Hixon customer service in the event you have a defective charger and they need to replace.

Question 4

Can the Charger be used to charge other types of 9volt rechargeable batteries?

Accepted Answer

Hi,
Yes it is a basic charger for most 9 volt batteries

ASIN	B07ZJCHXZB
Amperage	1.5 A
Antenna Location	Calculator, GPS, Remote Control, Toys
Battery Capacity	850 milliampere_hour
Battery Cell Type	Lithium Polymer
Battery Weight	12 g
Best Sellers Rank	#51,845 in Health & Household ( See Top 100 in Health & Household ) #12,567 in Household Supplies
Brand	Hixon
Customer Reviews	4.7 4.7 out of 5 stars (437)
Item Dimensions	0.79 x 0.79 x 0.79 inches
Item Weight	2.18 ounces
Manufacturer	Hixon
Model Number	K007
Number of Batteries	4 9V batteries required. (included)
Reusability	Rechargeable
Voltage	9 volts

9v Rechargeable Batteries,9 Volt Rechargeable Batteries with Charger kit,4-Pack 850mAh 9v Lithium Batteries for Alarms Wireless Microphones Smoke Detectors Toys Flashlights and More

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