2011Forum Batteries/Power
Comparaison des performances et de la fiabilité des batteries de caméras lithium-ion de différents fabricants
Il y a 15 ans. Le matériel et les prix ont peut-être changé depuis.
ControverséLes participants n’étaient pas d’accord et n’ont pas abouti à une conclusion. Lis les résultats comme des positions, pas comme une réponse.
Ce que le fil a révélé
- Un opérateur de caméra utilisant un modèle de batterie 160Wh a alimenté une caméra Panasonic HPX-2000 dessinant 43Wh pour 4 heures d'utilisation continue.
- Les stations de radiodiffusion professionnelles ont exploité avec succès 24 unités du même modèle de batterie pendant 4 ans sans défaillance.
- Un utilisateur a signalé avoir alimenté deux caméras Panasonic HPX-2000 pendant toute une journée de tournage avec deux batteries 190Wh.
- Pour les applications steadicam, deux batteries de 160Wh ont alimenté une caméra Panasonic HPX-2000 plus une unité de mise au point Bartech et un moniteur Transvideo pendant toute une journée de tournage.
- A 160Wh battery powered an Ikegami camera and Link HD transmitter for 70 minutes before voltage warning, matching the runtime of Anton Bauer Hytron 100 batteries which weigh more.
- Most lithium-ion battery packs use similar industry-standard 18650 cells with the same protection circuitry, differentiating mainly through case quality, component sourcing, and cell freshness.
- Leaving lithium-ion batteries attached to a camera after power-down causes short-cycling of the protection circuit, which can permanently damage the pack if it self-discharges below recoverable voltage levels.
- Lithium-ion cells have a shelf life of approximately 28 to 36 months and cannot be recovered after complete discharge below 2.5 volts per cell, unlike older battery chemistries.
- Chargers enter a recovery or low-voltage pulse cycle when presented with deeply discharged lithium-ion batteries, requiring extended time before normal charging resumes.
- Allowing lithium-ion batteries to cool before charging is advisable as most chargers include temperature sensors that prevent charging if overheating is detected.
- When comparing battery performance between models, comparing new batteries to aged batteries with years of use provides inaccurate results.
- Some Chinese-branded lithium-ion battery packs exhibit good initial capacity but degrade severely within less than one year of use.
- Anton Bauer Dionic HC design incorporates individual cell isolation holders and relocated protection circuitry for improved durability compared to earlier Dionic 90 designs.
- Swollen Chinese batteries can be difficult to mount and remove from Anton Bauer equipment due to poor tolerance in connector design.
Dépend de
- The 43Wh power draw figure is specific to that camera model and usage conditions.
- Some reports involve unnamed battery manufacturers from unclear time periods within an approximate 10-year window.
- The claim about battery lifespan and chemistry appears from a forum expert but lacks independent verification sources.
- Comparison between different battery brands involves subjective assessments of reliability and value.
- Long-term testing data extends only to several years for most reported cases.
- The discussion does not resolve whether imported batteries represent equivalent value to established brands.