Thank you for this great question, I would be happy to assist you. When it comes to our NIHM rechargeable batteries, the NH and HR6 are the same battery. NH is the beginning of the model number (NH15=AA battery) and HR6 is just a IEC number (International Electrotechnical Commission) all of our rechargeable batteries have a HR6 on them. The 2300mah battery is the latest battery we have on the market, it is new and improved by offering you a lower self discharge rate, meaning, once it is fully charged it will hold its charge for one year.
Thank you for taking the time to contact Energizer.
answered 1 year, 6 months ago
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