ITTSB.EU Blog Forum
Significant information’s in favor of a professional Workshop => All about Alkaline and Rechargeable Batteries NiMH => NiMH datasheet collection => Topic started by: Kiriakos GR on November 06, 2025, 02:45:54 PM
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VOLTCRAFT 270 mAh 8.4 V 6LR61 PP3
and or
Voltcraft Endurance NiMH 9 V block battery 270 mAh
There is no actual datasheet.
But they are few interesting details scattered, as documentation over product packaging and security datasheet.
Product name: 9 V Nickel/Metal Hydride rechargeable batteries
Item no. --- Size ---- Nominal Voltage -- Capacity -- Energy content
2542812 9 V, 6LR61 8.4 V 200 mAh 1.68 Wh
2542813 9 V, 6LR61 8.4 V 270 mAh 2.268 Wh
270 mAh
• Charge before use
• Use only chargers with output a constant charging current
• Standard charge 16 Hours at 27mA.
• Fast charge 72 min 270mA
ITTSB EU Notes:
Its almost unorthodox, Conrad this recommending double duration of theoretical needed of charging time.
But this information, it is a message for us with technical background.
Extended charging time at 0.1C this translates as recommendation, for us giving at the battery, a capacity forming charge, its and every time. 8)
This makes sense specifically for all 8.4 V PP3 (with six internal active cells).
A single battery, single active cell, this does not require battery pack balancing.
8.4 V PP3 this is considered as battery pack of six 1.4V elements, and as such, it does need battery pack balancing (especially when inner cells start aging).
Either way, a constant charging current this has two benefits to offer:
It helps new and unused 8.4 V PP3 them to activate their entire capacity.
It helps used aged 8.4 V PP3 as assistance to battery pack balancing (all inner elements to be fully charged).